209519980

素因数分解:

$2^2\times 5^1\times {\mathrm{1429}}^1\times {\mathrm{7331}}^1$

素因数の和:8769

約数の個数: 24

約数和(自身を含む): 440359920

約数和(自身を除く): 230839940

約数列:

[1, 2, 4, 5, 10, 20, 1429, 2858, 5716, 7145, 7331, 14290, 14662, 28580, 29324, 36655, 73310, 146620, 10475999, 20951998, 41903996, 52379995, 104759990, 209519980]

約数ペア:

[(1, 209519980), (2, 104759990), (4, 52379995), (5, 41903996), (10, 20951998), (20, 10475999), (1429, 146620), (2858, 73310), (5716, 36655), (7145, 29324), (7331, 28580), (14290, 14662)]