81211780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312353}}^1$

素因数の和:312375

約数の個数: 24

約数和(自身を含む): 183664152

約数和(自身を除く): 102452372

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312353, 624706, 1249412, 1561765, 3123530, 4060589, 6247060, 8121178, 16242356, 20302945, 40605890, 81211780]

約数ペア:

[(1, 81211780), (2, 40605890), (4, 20302945), (5, 16242356), (10, 8121178), (13, 6247060), (20, 4060589), (26, 3123530), (52, 1561765), (65, 1249412), (130, 624706), (260, 312353)]