21770020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15331}}^1$

素因数の和:15411

約数の個数: 24

約数和(自身を含む): 46363968

約数和(自身を除く): 24593948

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15331, 30662, 61324, 76655, 153310, 306620, 1088501, 2177002, 4354004, 5442505, 10885010, 21770020]

約数ペア:

[(1, 21770020), (2, 10885010), (4, 5442505), (5, 4354004), (10, 2177002), (20, 1088501), (71, 306620), (142, 153310), (284, 76655), (355, 61324), (710, 30662), (1420, 15331)]