21390560

素因数分解:

$2^5\times 5^1\times {\mathrm{133691}}^1$

素因数の和:133706

約数の個数: 24

約数和(自身を含む): 50535576

約数和(自身を除く): 29145016

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 133691, 267382, 534764, 668455, 1069528, 1336910, 2139056, 2673820, 4278112, 5347640, 10695280, 21390560]

約数ペア:

[(1, 21390560), (2, 10695280), (4, 5347640), (5, 4278112), (8, 2673820), (10, 2139056), (16, 1336910), (20, 1069528), (32, 668455), (40, 534764), (80, 267382), (160, 133691)]