21986204

素因数分解:

$2^2\times {\mathrm{89}}^1\times {\mathrm{151}}^1\times {\mathrm{409}}^1$

素因数の和:653

約数の個数: 24

約数和(自身を含む): 39261600

約数和(自身を除く): 17275396

約数列:

[1, 2, 4, 89, 151, 178, 302, 356, 409, 604, 818, 1636, 13439, 26878, 36401, 53756, 61759, 72802, 123518, 145604, 247036, 5496551, 10993102, 21986204]

約数ペア:

[(1, 21986204), (2, 10993102), (4, 5496551), (89, 247036), (151, 145604), (178, 123518), (302, 72802), (356, 61759), (409, 53756), (604, 36401), (818, 26878), (1636, 13439)]