81767920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78623}}^1$

素因数の和:78649

約数の個数: 40

約数和(自身を含む): 204736896

約数和(自身を除く): 122968976

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 78623, 157246, 314492, 393115, 628984, 786230, 1022099, 1257968, 1572460, 2044198, 3144920, 4088396, 5110495, 6289840, 8176792, 10220990, 16353584, 20441980, 40883960, 81767920]

約数ペア:

[(1, 81767920), (2, 40883960), (4, 20441980), (5, 16353584), (8, 10220990), (10, 8176792), (13, 6289840), (16, 5110495), (20, 4088396), (26, 3144920), (40, 2044198), (52, 1572460), (65, 1257968), (80, 1022099), (104, 786230), (130, 628984), (208, 393115), (260, 314492), (520, 157246), (1040, 78623)]