9921820

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 21732480

約数和(自身を除く): 11810660

約数列:

[1, 2, 4, 5, 10, 20, 43, 83, 86, 139, 166, 172, 215, 278, 332, 415, 430, 556, 695, 830, 860, 1390, 1660, 2780, 3569, 5977, 7138, 11537, 11954, 14276, 17845, 23074, 23908, 29885, 35690, 46148, 57685, 59770, 71380, 115370, 119540, 230740, 496091, 992182, 1984364, 2480455, 4960910, 9921820]

約数ペア:

[(1, 9921820), (2, 4960910), (4, 2480455), (5, 1984364), (10, 992182), (20, 496091), (43, 230740), (83, 119540), (86, 115370), (139, 71380), (166, 59770), (172, 57685), (215, 46148), (278, 35690), (332, 29885), (415, 23908), (430, 23074), (556, 17845), (695, 14276), (830, 11954), (860, 11537), (1390, 7138), (1660, 5977), (2780, 3569)]