21356480

素因数分解:

$2^6\times 5^1\times {\mathrm{66739}}^1$

素因数の和:66756

約数の個数: 28

約数和(自身を含む): 50855880

約数和(自身を除く): 29499400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 66739, 133478, 266956, 333695, 533912, 667390, 1067824, 1334780, 2135648, 2669560, 4271296, 5339120, 10678240, 21356480]

約数ペア:

[(1, 21356480), (2, 10678240), (4, 5339120), (5, 4271296), (8, 2669560), (10, 2135648), (16, 1334780), (20, 1067824), (32, 667390), (40, 533912), (64, 333695), (80, 266956), (160, 133478), (320, 66739)]