64622920

素因数分解:

$2^3\times 5^1\times {\mathrm{809}}^1\times {\mathrm{1997}}^1$

素因数の和:2817

約数の個数: 32

約数和(自身を含む): 145654200

約数和(自身を除く): 81031280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 809, 1618, 1997, 3236, 3994, 4045, 6472, 7988, 8090, 9985, 15976, 16180, 19970, 32360, 39940, 79880, 1615573, 3231146, 6462292, 8077865, 12924584, 16155730, 32311460, 64622920]

約数ペア:

[(1, 64622920), (2, 32311460), (4, 16155730), (5, 12924584), (8, 8077865), (10, 6462292), (20, 3231146), (40, 1615573), (809, 79880), (1618, 39940), (1997, 32360), (3236, 19970), (3994, 16180), (4045, 15976), (6472, 9985), (7988, 8090)]