81421575

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{25247}}^1$

素因数の和:25303

約数の個数: 24

約数和(自身を含む): 137753088

約数和(自身を除く): 56331513

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 215, 645, 1075, 3225, 25247, 75741, 126235, 378705, 631175, 1085621, 1893525, 3256863, 5428105, 16284315, 27140525, 81421575]

約数ペア:

[(1, 81421575), (3, 27140525), (5, 16284315), (15, 5428105), (25, 3256863), (43, 1893525), (75, 1085621), (129, 631175), (215, 378705), (645, 126235), (1075, 75741), (3225, 25247)]