21499870

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{3041}}^1$

素因数の和:3156

約数の個数: 32

約数和(自身を含む): 44680896

約数和(自身を除く): 23181026

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 101, 202, 505, 707, 1010, 1414, 3041, 3535, 6082, 7070, 15205, 21287, 30410, 42574, 106435, 212870, 307141, 614282, 1535705, 2149987, 3071410, 4299974, 10749935, 21499870]

約数ペア:

[(1, 21499870), (2, 10749935), (5, 4299974), (7, 3071410), (10, 2149987), (14, 1535705), (35, 614282), (70, 307141), (101, 212870), (202, 106435), (505, 42574), (707, 30410), (1010, 21287), (1414, 15205), (3041, 7070), (3535, 6082)]