20913040

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{3581}}^1$

素因数の和:3667

約数の個数: 40

約数和(自身を含む): 49302648

約数和(自身を除く): 28389608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 146, 292, 365, 584, 730, 1168, 1460, 2920, 3581, 5840, 7162, 14324, 17905, 28648, 35810, 57296, 71620, 143240, 261413, 286480, 522826, 1045652, 1307065, 2091304, 2614130, 4182608, 5228260, 10456520, 20913040]

約数ペア:

[(1, 20913040), (2, 10456520), (4, 5228260), (5, 4182608), (8, 2614130), (10, 2091304), (16, 1307065), (20, 1045652), (40, 522826), (73, 286480), (80, 261413), (146, 143240), (292, 71620), (365, 57296), (584, 35810), (730, 28648), (1168, 17905), (1460, 14324), (2920, 7162), (3581, 5840)]