20278155

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1\times {\mathrm{211}}^1$

素因数の和:411

約数の個数: 32

約数和(自身を含む): 33580800

約数和(自身を除く): 13302645

約数列:

[1, 3, 5, 15, 43, 129, 149, 211, 215, 447, 633, 645, 745, 1055, 2235, 3165, 6407, 9073, 19221, 27219, 31439, 32035, 45365, 94317, 96105, 136095, 157195, 471585, 1351877, 4055631, 6759385, 20278155]

約数ペア:

[(1, 20278155), (3, 6759385), (5, 4055631), (15, 1351877), (43, 471585), (129, 157195), (149, 136095), (211, 96105), (215, 94317), (447, 45365), (633, 32035), (645, 31439), (745, 27219), (1055, 19221), (2235, 9073), (3165, 6407)]