20943680

素因数分解:

$2^6\times 5^1\times {\mathrm{65449}}^1$

素因数の和:65466

約数の個数: 28

約数和(自身を含む): 49872900

約数和(自身を除く): 28929220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 65449, 130898, 261796, 327245, 523592, 654490, 1047184, 1308980, 2094368, 2617960, 4188736, 5235920, 10471840, 20943680]

約数ペア:

[(1, 20943680), (2, 10471840), (4, 5235920), (5, 4188736), (8, 2617960), (10, 2094368), (16, 1308980), (20, 1047184), (32, 654490), (40, 523592), (64, 327245), (80, 261796), (160, 130898), (320, 65449)]