31123720

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^2\times {\mathrm{277}}^1$

素因数の和:394

約数の個数: 48

約数和(自身を含む): 71632260

約数和(自身を除く): 40508540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 277, 424, 530, 554, 1060, 1108, 1385, 2120, 2216, 2770, 2809, 5540, 5618, 11080, 11236, 14045, 14681, 22472, 28090, 29362, 56180, 58724, 73405, 112360, 117448, 146810, 293620, 587240, 778093, 1556186, 3112372, 3890465, 6224744, 7780930, 15561860, 31123720]

約数ペア:

[(1, 31123720), (2, 15561860), (4, 7780930), (5, 6224744), (8, 3890465), (10, 3112372), (20, 1556186), (40, 778093), (53, 587240), (106, 293620), (212, 146810), (265, 117448), (277, 112360), (424, 73405), (530, 58724), (554, 56180), (1060, 29362), (1108, 28090), (1385, 22472), (2120, 14681), (2216, 14045), (2770, 11236), (2809, 11080), (5540, 5618)]