21210840

素因数分解:

$2^3\times 3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{443}}^1$

素因数の和:486

約数の個数: 192

約数和(自身を含む): 83116800

約数和(自身を除く): 61905960

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 19, 20, 21, 24, 28, 30, 35, 36, 38, 40, 42, 45, 56, 57, 60, 63, 70, 72, 76, 84, 90, 95, 105, 114, 120, 126, 133, 140, 152, 168, 171, 180, 190, 210, 228, 252, 266, 280, 285, 315, 342, 360, 380, 399, 420, 443, 456, 504, 532, 570, 630, 665, 684, 760, 798, 840, 855, 886, 1064, 1140, 1197, 1260, 1329, 1330, 1368, 1596, 1710, 1772, 1995, 2215, 2280, 2394, 2520, 2658, 2660, 3101, 3192, 3420, 3544, 3987, 3990, 4430, 4788, 5316, 5320, 5985, 6202, 6645, 6840, 7974, 7980, 8417, 8860, 9303, 9576, 10632, 11970, 12404, 13290, 15505, 15948, 15960, 16834, 17720, 18606, 19935, 23940, 24808, 25251, 26580, 27909, 31010, 31896, 33668, 37212, 39870, 42085, 46515, 47880, 50502, 53160, 55818, 58919, 62020, 67336, 74424, 75753, 79740, 84170, 93030, 101004, 111636, 117838, 124040, 126255, 139545, 151506, 159480, 168340, 176757, 186060, 202008, 223272, 235676, 252510, 279090, 294595, 303012, 336680, 353514, 372120, 378765, 471352, 505020, 530271, 558180, 589190, 606024, 707028, 757530, 883785, 1010040, 1060542, 1116360, 1178380, 1414056, 1515060, 1767570, 2121084, 2356760, 2651355, 3030120, 3535140, 4242168, 5302710, 7070280, 10605420, 21210840]

約数ペア:

[(1, 21210840), (2, 10605420), (3, 7070280), (4, 5302710), (5, 4242168), (6, 3535140), (7, 3030120), (8, 2651355), (9, 2356760), (10, 2121084), (12, 1767570), (14, 1515060), (15, 1414056), (18, 1178380), (19, 1116360), (20, 1060542), (21, 1010040), (24, 883785), (28, 757530), (30, 707028), (35, 606024), (36, 589190), (38, 558180), (40, 530271), (42, 505020), (45, 471352), (56, 378765), (57, 372120), (60, 353514), (63, 336680), (70, 303012), (72, 294595), (76, 279090), (84, 252510), (90, 235676), (95, 223272), (105, 202008), (114, 186060), (120, 176757), (126, 168340), (133, 159480), (140, 151506), (152, 139545), (168, 126255), (171, 124040), (180, 117838), (190, 111636), (210, 101004), (228, 93030), (252, 84170), (266, 79740), (280, 75753), (285, 74424), (315, 67336), (342, 62020), (360, 58919), (380, 55818), (399, 53160), (420, 50502), (443, 47880), (456, 46515), (504, 42085), (532, 39870), (570, 37212), (630, 33668), (665, 31896), (684, 31010), (760, 27909), (798, 26580), (840, 25251), (855, 24808), (886, 23940), (1064, 19935), (1140, 18606), (1197, 17720), (1260, 16834), (1329, 15960), (1330, 15948), (1368, 15505), (1596, 13290), (1710, 12404), (1772, 11970), (1995, 10632), (2215, 9576), (2280, 9303), (2394, 8860), (2520, 8417), (2658, 7980), (2660, 7974), (3101, 6840), (3192, 6645), (3420, 6202), (3544, 5985), (3987, 5320), (3990, 5316), (4430, 4788)]