219940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{1571}}^1$

素因数の和:1587

約数の個数: 24

約数和(自身を含む): 528192

約数和(自身を除く): 308252

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 1571, 3142, 6284, 7855, 10997, 15710, 21994, 31420, 43988, 54985, 109970, 219940]

約数ペア:

[(1, 219940), (2, 109970), (4, 54985), (5, 43988), (7, 31420), (10, 21994), (14, 15710), (20, 10997), (28, 7855), (35, 6284), (70, 3142), (140, 1571)]