20814020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{569}}^1$

素因数の和:668

約数の個数: 48

約数和(自身を含む): 45964800

約数和(自身を除く): 25150780

約数列:

[1, 2, 4, 5, 10, 20, 31, 59, 62, 118, 124, 155, 236, 295, 310, 569, 590, 620, 1138, 1180, 1829, 2276, 2845, 3658, 5690, 7316, 9145, 11380, 17639, 18290, 33571, 35278, 36580, 67142, 70556, 88195, 134284, 167855, 176390, 335710, 352780, 671420, 1040701, 2081402, 4162804, 5203505, 10407010, 20814020]

約数ペア:

[(1, 20814020), (2, 10407010), (4, 5203505), (5, 4162804), (10, 2081402), (20, 1040701), (31, 671420), (59, 352780), (62, 335710), (118, 176390), (124, 167855), (155, 134284), (236, 88195), (295, 70556), (310, 67142), (569, 36580), (590, 35278), (620, 33571), (1138, 18290), (1180, 17639), (1829, 11380), (2276, 9145), (2845, 7316), (3658, 5690)]