31213240

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{7159}}^1$

素因数の和:7279

約数の個数: 32

約数和(自身を含む): 70884000

約数和(自身を除く): 39670760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 7159, 14318, 28636, 35795, 57272, 71590, 143180, 286360, 780331, 1560662, 3121324, 3901655, 6242648, 7803310, 15606620, 31213240]

約数ペア:

[(1, 31213240), (2, 15606620), (4, 7803310), (5, 6242648), (8, 3901655), (10, 3121324), (20, 1560662), (40, 780331), (109, 286360), (218, 143180), (436, 71590), (545, 57272), (872, 35795), (1090, 28636), (2180, 14318), (4360, 7159)]