21491416

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{157}}^1\times {\mathrm{241}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 41294880

約数和(自身を除く): 19803464

約数列:

[1, 2, 4, 8, 71, 142, 157, 241, 284, 314, 482, 568, 628, 964, 1256, 1928, 11147, 17111, 22294, 34222, 37837, 44588, 68444, 75674, 89176, 136888, 151348, 302696, 2686427, 5372854, 10745708, 21491416]

約数ペア:

[(1, 21491416), (2, 10745708), (4, 5372854), (8, 2686427), (71, 302696), (142, 151348), (157, 136888), (241, 89176), (284, 75674), (314, 68444), (482, 44588), (568, 37837), (628, 34222), (964, 22294), (1256, 17111), (1928, 11147)]