21997210

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{36061}}^1$

素因数の和:36129

約数の個数: 16

約数和(自身を含む): 40245192

約数和(自身を除く): 18247982

約数列:

[1, 2, 5, 10, 61, 122, 305, 610, 36061, 72122, 180305, 360610, 2199721, 4399442, 10998605, 21997210]

約数ペア:

[(1, 21997210), (2, 10998605), (5, 4399442), (10, 2199721), (61, 360610), (122, 180305), (305, 72122), (610, 36061)]