21000859180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{457}}^1\times {\mathrm{5381}}^1$

素因数の和:5915

約数の個数: 96

約数和(自身を含む): 51349963392

約数和(自身を除く): 30349104212

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 122, 140, 244, 305, 427, 457, 610, 854, 914, 1220, 1708, 1828, 2135, 2285, 3199, 4270, 4570, 5381, 6398, 8540, 9140, 10762, 12796, 15995, 21524, 26905, 27877, 31990, 37667, 53810, 55754, 63980, 75334, 107620, 111508, 139385, 150668, 188335, 195139, 278770, 328241, 376670, 390278, 557540, 656482, 753340, 780556, 975695, 1312964, 1641205, 1951390, 2297687, 2459117, 3282410, 3902780, 4595374, 4918234, 6564820, 9190748, 9836468, 11488435, 12295585, 17213819, 22976870, 24591170, 34427638, 45953740, 49182340, 68855276, 86069095, 150006137, 172138190, 300012274, 344276380, 600024548, 750030685, 1050042959, 1500061370, 2100085918, 3000122740, 4200171836, 5250214795, 10500429590, 21000859180]

約数ペア:

[(1, 21000859180), (2, 10500429590), (4, 5250214795), (5, 4200171836), (7, 3000122740), (10, 2100085918), (14, 1500061370), (20, 1050042959), (28, 750030685), (35, 600024548), (61, 344276380), (70, 300012274), (122, 172138190), (140, 150006137), (244, 86069095), (305, 68855276), (427, 49182340), (457, 45953740), (610, 34427638), (854, 24591170), (914, 22976870), (1220, 17213819), (1708, 12295585), (1828, 11488435), (2135, 9836468), (2285, 9190748), (3199, 6564820), (4270, 4918234), (4570, 4595374), (5381, 3902780), (6398, 3282410), (8540, 2459117), (9140, 2297687), (10762, 1951390), (12796, 1641205), (15995, 1312964), (21524, 975695), (26905, 780556), (27877, 753340), (31990, 656482), (37667, 557540), (53810, 390278), (55754, 376670), (63980, 328241), (75334, 278770), (107620, 195139), (111508, 188335), (139385, 150668)]