21750120

素因数分解:

$2^3\times 3^4\times 5^1\times 7^2\times {\mathrm{137}}^1$

素因数の和:174

約数の個数: 240

約数和(自身を含む): 85660740

約数和(自身を除く): 63910620

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 49, 54, 56, 60, 63, 70, 72, 81, 84, 90, 98, 105, 108, 120, 126, 135, 137, 140, 147, 162, 168, 180, 189, 196, 210, 216, 245, 252, 270, 274, 280, 294, 315, 324, 360, 378, 392, 405, 411, 420, 441, 490, 504, 540, 548, 567, 588, 630, 648, 685, 735, 756, 810, 822, 840, 882, 945, 959, 980, 1080, 1096, 1134, 1176, 1233, 1260, 1323, 1370, 1470, 1512, 1620, 1644, 1764, 1890, 1918, 1960, 2055, 2205, 2268, 2466, 2520, 2646, 2740, 2835, 2877, 2940, 3240, 3288, 3528, 3699, 3780, 3836, 3969, 4110, 4410, 4536, 4795, 4932, 5292, 5480, 5670, 5754, 5880, 6165, 6615, 6713, 7398, 7560, 7672, 7938, 8220, 8631, 8820, 9590, 9864, 10584, 11097, 11340, 11508, 12330, 13230, 13426, 14385, 14796, 15876, 16440, 17262, 17640, 18495, 19180, 19845, 20139, 22194, 22680, 23016, 24660, 25893, 26460, 26852, 28770, 29592, 31752, 33565, 34524, 36990, 38360, 39690, 40278, 43155, 44388, 49320, 51786, 52920, 53704, 55485, 57540, 60417, 67130, 69048, 73980, 77679, 79380, 80556, 86310, 88776, 100695, 103572, 110970, 115080, 120834, 129465, 134260, 147960, 155358, 158760, 161112, 172620, 181251, 201390, 207144, 221940, 241668, 258930, 268520, 302085, 310716, 345240, 362502, 388395, 402780, 443880, 483336, 517860, 543753, 604170, 621432, 725004, 776790, 805560, 906255, 1035720, 1087506, 1208340, 1450008, 1553580, 1812510, 2175012, 2416680, 2718765, 3107160, 3625020, 4350024, 5437530, 7250040, 10875060, 21750120]

約数ペア:

[(1, 21750120), (2, 10875060), (3, 7250040), (4, 5437530), (5, 4350024), (6, 3625020), (7, 3107160), (8, 2718765), (9, 2416680), (10, 2175012), (12, 1812510), (14, 1553580), (15, 1450008), (18, 1208340), (20, 1087506), (21, 1035720), (24, 906255), (27, 805560), (28, 776790), (30, 725004), (35, 621432), (36, 604170), (40, 543753), (42, 517860), (45, 483336), (49, 443880), (54, 402780), (56, 388395), (60, 362502), (63, 345240), (70, 310716), (72, 302085), (81, 268520), (84, 258930), (90, 241668), (98, 221940), (105, 207144), (108, 201390), (120, 181251), (126, 172620), (135, 161112), (137, 158760), (140, 155358), (147, 147960), (162, 134260), (168, 129465), (180, 120834), (189, 115080), (196, 110970), (210, 103572), (216, 100695), (245, 88776), (252, 86310), (270, 80556), (274, 79380), (280, 77679), (294, 73980), (315, 69048), (324, 67130), (360, 60417), (378, 57540), (392, 55485), (405, 53704), (411, 52920), (420, 51786), (441, 49320), (490, 44388), (504, 43155), (540, 40278), (548, 39690), (567, 38360), (588, 36990), (630, 34524), (648, 33565), (685, 31752), (735, 29592), (756, 28770), (810, 26852), (822, 26460), (840, 25893), (882, 24660), (945, 23016), (959, 22680), (980, 22194), (1080, 20139), (1096, 19845), (1134, 19180), (1176, 18495), (1233, 17640), (1260, 17262), (1323, 16440), (1370, 15876), (1470, 14796), (1512, 14385), (1620, 13426), (1644, 13230), (1764, 12330), (1890, 11508), (1918, 11340), (1960, 11097), (2055, 10584), (2205, 9864), (2268, 9590), (2466, 8820), (2520, 8631), (2646, 8220), (2740, 7938), (2835, 7672), (2877, 7560), (2940, 7398), (3240, 6713), (3288, 6615), (3528, 6165), (3699, 5880), (3780, 5754), (3836, 5670), (3969, 5480), (4110, 5292), (4410, 4932), (4536, 4795)]