20877680

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{8999}}^1$

素因数の和:9041

約数の個数: 40

約数和(自身を含む): 50220000

約数和(自身を除く): 29342320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 8999, 17998, 35996, 44995, 71992, 89990, 143984, 179980, 260971, 359960, 521942, 719920, 1043884, 1304855, 2087768, 2609710, 4175536, 5219420, 10438840, 20877680]

約数ペア:

[(1, 20877680), (2, 10438840), (4, 5219420), (5, 4175536), (8, 2609710), (10, 2087768), (16, 1304855), (20, 1043884), (29, 719920), (40, 521942), (58, 359960), (80, 260971), (116, 179980), (145, 143984), (232, 89990), (290, 71992), (464, 44995), (580, 35996), (1160, 17998), (2320, 8999)]