31656820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{389}}^1$

素因数の和:724

約数の個数: 48

約数和(自身を含む): 72006480

約数和(自身を除く): 40349660

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 313, 389, 626, 778, 1252, 1556, 1565, 1945, 3130, 3890, 4069, 5057, 6260, 7780, 8138, 10114, 16276, 20228, 20345, 25285, 40690, 50570, 81380, 101140, 121757, 243514, 487028, 608785, 1217570, 1582841, 2435140, 3165682, 6331364, 7914205, 15828410, 31656820]

約数ペア:

[(1, 31656820), (2, 15828410), (4, 7914205), (5, 6331364), (10, 3165682), (13, 2435140), (20, 1582841), (26, 1217570), (52, 608785), (65, 487028), (130, 243514), (260, 121757), (313, 101140), (389, 81380), (626, 50570), (778, 40690), (1252, 25285), (1556, 20345), (1565, 20228), (1945, 16276), (3130, 10114), (3890, 8138), (4069, 7780), (5057, 6260)]