21627280

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6287}}^1$

素因数の和:6343

約数の個数: 40

約数和(自身を含む): 51460992

約数和(自身を除く): 29833712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 6287, 12574, 25148, 31435, 50296, 62870, 100592, 125740, 251480, 270341, 502960, 540682, 1081364, 1351705, 2162728, 2703410, 4325456, 5406820, 10813640, 21627280]

約数ペア:

[(1, 21627280), (2, 10813640), (4, 5406820), (5, 4325456), (8, 2703410), (10, 2162728), (16, 1351705), (20, 1081364), (40, 540682), (43, 502960), (80, 270341), (86, 251480), (172, 125740), (215, 100592), (344, 62870), (430, 50296), (688, 31435), (860, 25148), (1720, 12574), (3440, 6287)]