21238288

素因数分解:

$2^4\times {\mathrm{137}}^1\times {\mathrm{9689}}^1$

素因数の和:9834

約数の個数: 20

約数和(自身を含む): 41453820

約数和(自身を除く): 20215532

約数列:

[1, 2, 4, 8, 16, 137, 274, 548, 1096, 2192, 9689, 19378, 38756, 77512, 155024, 1327393, 2654786, 5309572, 10619144, 21238288]

約数ペア:

[(1, 21238288), (2, 10619144), (4, 5309572), (8, 2654786), (16, 1327393), (137, 155024), (274, 77512), (548, 38756), (1096, 19378), (2192, 9689)]