21254030

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{1439}}^1$

素因数の和:1664

約数の個数: 32

約数和(自身を含む): 43960320

約数和(自身を除く): 22706290

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 211, 422, 1055, 1439, 1477, 2110, 2878, 2954, 7195, 7385, 10073, 14390, 14770, 20146, 50365, 100730, 303629, 607258, 1518145, 2125403, 3036290, 4250806, 10627015, 21254030]

約数ペア:

[(1, 21254030), (2, 10627015), (5, 4250806), (7, 3036290), (10, 2125403), (14, 1518145), (35, 607258), (70, 303629), (211, 100730), (422, 50365), (1055, 20146), (1439, 14770), (1477, 14390), (2110, 10073), (2878, 7385), (2954, 7195)]