20438078960

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19651999}}^1$

素因数の和:19652025

約数の個数: 40

約数和(自身を含む): 51173808000

約数和(自身を除く): 30735729040

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19651999, 39303998, 78607996, 98259995, 157215992, 196519990, 255475987, 314431984, 393039980, 510951974, 786079960, 1021903948, 1277379935, 1572159920, 2043807896, 2554759870, 4087615792, 5109519740, 10219039480, 20438078960]

約数ペア:

[(1, 20438078960), (2, 10219039480), (4, 5109519740), (5, 4087615792), (8, 2554759870), (10, 2043807896), (13, 1572159920), (16, 1277379935), (20, 1021903948), (26, 786079960), (40, 510951974), (52, 393039980), (65, 314431984), (80, 255475987), (104, 196519990), (130, 157215992), (208, 98259995), (260, 78607996), (520, 39303998), (1040, 19651999)]