21878210

素因数分解:

$2^1\times 5^1\times {\mathrm{701}}^1\times {\mathrm{3121}}^1$

素因数の和:3829

約数の個数: 16

約数和(自身を含む): 39449592

約数和(自身を除く): 17571382

約数列:

[1, 2, 5, 10, 701, 1402, 3121, 3505, 6242, 7010, 15605, 31210, 2187821, 4375642, 10939105, 21878210]

約数ペア:

[(1, 21878210), (2, 10939105), (5, 4375642), (10, 2187821), (701, 31210), (1402, 15605), (3121, 7010), (3505, 6242)]