20171600

素因数分解:

$2^4\times 5^2\times {\mathrm{211}}^1\times {\mathrm{239}}^1$

素因数の和:468

約数の個数: 60

約数和(自身を含む): 48895680

約数和(自身を除く): 28724080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 211, 239, 400, 422, 478, 844, 956, 1055, 1195, 1688, 1912, 2110, 2390, 3376, 3824, 4220, 4780, 5275, 5975, 8440, 9560, 10550, 11950, 16880, 19120, 21100, 23900, 42200, 47800, 50429, 84400, 95600, 100858, 201716, 252145, 403432, 504290, 806864, 1008580, 1260725, 2017160, 2521450, 4034320, 5042900, 10085800, 20171600]

約数ペア:

[(1, 20171600), (2, 10085800), (4, 5042900), (5, 4034320), (8, 2521450), (10, 2017160), (16, 1260725), (20, 1008580), (25, 806864), (40, 504290), (50, 403432), (80, 252145), (100, 201716), (200, 100858), (211, 95600), (239, 84400), (400, 50429), (422, 47800), (478, 42200), (844, 23900), (956, 21100), (1055, 19120), (1195, 16880), (1688, 11950), (1912, 10550), (2110, 9560), (2390, 8440), (3376, 5975), (3824, 5275), (4220, 4780)]