100000400

素因数分解:

$2^4\times 5^2\times {\mathrm{53}}^2\times {\mathrm{89}}^1$

素因数の和:213

約数の個数: 90

約数和(自身を含む): 247620870

約数和(自身を除く): 147620470

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 53, 80, 89, 100, 106, 178, 200, 212, 265, 356, 400, 424, 445, 530, 712, 848, 890, 1060, 1325, 1424, 1780, 2120, 2225, 2650, 2809, 3560, 4240, 4450, 4717, 5300, 5618, 7120, 8900, 9434, 10600, 11236, 14045, 17800, 18868, 21200, 22472, 23585, 28090, 35600, 37736, 44944, 47170, 56180, 70225, 75472, 94340, 112360, 117925, 140450, 188680, 224720, 235850, 250001, 280900, 377360, 471700, 500002, 561800, 943400, 1000004, 1123600, 1250005, 1886800, 2000008, 2500010, 4000016, 5000020, 6250025, 10000040, 12500050, 20000080, 25000100, 50000200, 100000400]

約数ペア:

[(1, 100000400), (2, 50000200), (4, 25000100), (5, 20000080), (8, 12500050), (10, 10000040), (16, 6250025), (20, 5000020), (25, 4000016), (40, 2500010), (50, 2000008), (53, 1886800), (80, 1250005), (89, 1123600), (100, 1000004), (106, 943400), (178, 561800), (200, 500002), (212, 471700), (265, 377360), (356, 280900), (400, 250001), (424, 235850), (445, 224720), (530, 188680), (712, 140450), (848, 117925), (890, 112360), (1060, 94340), (1325, 75472), (1424, 70225), (1780, 56180), (2120, 47170), (2225, 44944), (2650, 37736), (2809, 35600), (3560, 28090), (4240, 23585), (4450, 22472), (4717, 21200), (5300, 18868), (5618, 17800), (7120, 14045), (8900, 11236), (9434, 10600)]