20980960

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1$

素因数の和:177

約数の個数: 192

約数和(自身を含む): 67060224

約数和(自身を除く): 46079264

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 20, 22, 26, 28, 32, 35, 40, 44, 52, 55, 56, 65, 70, 77, 80, 88, 91, 104, 110, 112, 130, 131, 140, 143, 154, 160, 176, 182, 208, 220, 224, 260, 262, 280, 286, 308, 352, 364, 385, 416, 440, 455, 520, 524, 560, 572, 616, 655, 715, 728, 770, 880, 910, 917, 1001, 1040, 1048, 1120, 1144, 1232, 1310, 1430, 1441, 1456, 1540, 1703, 1760, 1820, 1834, 2002, 2080, 2096, 2288, 2464, 2620, 2860, 2882, 2912, 3080, 3406, 3640, 3668, 4004, 4192, 4576, 4585, 5005, 5240, 5720, 5764, 6160, 6812, 7205, 7280, 7336, 8008, 8515, 9170, 10010, 10087, 10480, 11440, 11528, 11921, 12320, 13624, 14410, 14560, 14672, 16016, 17030, 18340, 18733, 20020, 20174, 20960, 22880, 23056, 23842, 27248, 28820, 29344, 32032, 34060, 36680, 37466, 40040, 40348, 46112, 47684, 50435, 54496, 57640, 59605, 68120, 73360, 74932, 80080, 80696, 93665, 95368, 100870, 115280, 119210, 131131, 136240, 146720, 149864, 160160, 161392, 187330, 190736, 201740, 230560, 238420, 262262, 272480, 299728, 322784, 374660, 381472, 403480, 476840, 524524, 599456, 655655, 749320, 806960, 953680, 1049048, 1311310, 1498640, 1613920, 1907360, 2098096, 2622620, 2997280, 4196192, 5245240, 10490480, 20980960]

約数ペア:

[(1, 20980960), (2, 10490480), (4, 5245240), (5, 4196192), (7, 2997280), (8, 2622620), (10, 2098096), (11, 1907360), (13, 1613920), (14, 1498640), (16, 1311310), (20, 1049048), (22, 953680), (26, 806960), (28, 749320), (32, 655655), (35, 599456), (40, 524524), (44, 476840), (52, 403480), (55, 381472), (56, 374660), (65, 322784), (70, 299728), (77, 272480), (80, 262262), (88, 238420), (91, 230560), (104, 201740), (110, 190736), (112, 187330), (130, 161392), (131, 160160), (140, 149864), (143, 146720), (154, 136240), (160, 131131), (176, 119210), (182, 115280), (208, 100870), (220, 95368), (224, 93665), (260, 80696), (262, 80080), (280, 74932), (286, 73360), (308, 68120), (352, 59605), (364, 57640), (385, 54496), (416, 50435), (440, 47684), (455, 46112), (520, 40348), (524, 40040), (560, 37466), (572, 36680), (616, 34060), (655, 32032), (715, 29344), (728, 28820), (770, 27248), (880, 23842), (910, 23056), (917, 22880), (1001, 20960), (1040, 20174), (1048, 20020), (1120, 18733), (1144, 18340), (1232, 17030), (1310, 16016), (1430, 14672), (1441, 14560), (1456, 14410), (1540, 13624), (1703, 12320), (1760, 11921), (1820, 11528), (1834, 11440), (2002, 10480), (2080, 10087), (2096, 10010), (2288, 9170), (2464, 8515), (2620, 8008), (2860, 7336), (2882, 7280), (2912, 7205), (3080, 6812), (3406, 6160), (3640, 5764), (3668, 5720), (4004, 5240), (4192, 5005), (4576, 4585)]