128912260

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{207923}}^1$

素因数の和:207963

約数の個数: 24

約数和(自身を含む): 279449856

約数和(自身を除く): 150537596

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 207923, 415846, 831692, 1039615, 2079230, 4158460, 6445613, 12891226, 25782452, 32228065, 64456130, 128912260]

約数ペア:

[(1, 128912260), (2, 64456130), (4, 32228065), (5, 25782452), (10, 12891226), (20, 6445613), (31, 4158460), (62, 2079230), (124, 1039615), (155, 831692), (310, 415846), (620, 207923)]