21240710

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{1051}}^1$

素因数の和:1148

約数の個数: 32

約数和(自身を含む): 39992832

約数和(自身を除く): 18752122

約数列:

[1, 2, 5, 10, 43, 47, 86, 94, 215, 235, 430, 470, 1051, 2021, 2102, 4042, 5255, 10105, 10510, 20210, 45193, 49397, 90386, 98794, 225965, 246985, 451930, 493970, 2124071, 4248142, 10620355, 21240710]

約数ペア:

[(1, 21240710), (2, 10620355), (5, 4248142), (10, 2124071), (43, 493970), (47, 451930), (86, 246985), (94, 225965), (215, 98794), (235, 90386), (430, 49397), (470, 45193), (1051, 20210), (2021, 10510), (2102, 10105), (4042, 5255)]