20809820

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{35879}}^1$

素因数の和:35917

約数の個数: 24

約数和(自身を含む): 45208800

約数和(自身を除く): 24398980

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 35879, 71758, 143516, 179395, 358790, 717580, 1040491, 2080982, 4161964, 5202455, 10404910, 20809820]

約数ペア:

[(1, 20809820), (2, 10404910), (4, 5202455), (5, 4161964), (10, 2080982), (20, 1040491), (29, 717580), (58, 358790), (116, 179395), (145, 143516), (290, 71758), (580, 35879)]