129245840

素因数分解:

$2^4\times 5^1\times {\mathrm{809}}^1\times {\mathrm{1997}}^1$

素因数の和:2819

約数の個数: 40

約数和(自身を含む): 301018680

約数和(自身を除く): 171772840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 809, 1618, 1997, 3236, 3994, 4045, 6472, 7988, 8090, 9985, 12944, 15976, 16180, 19970, 31952, 32360, 39940, 64720, 79880, 159760, 1615573, 3231146, 6462292, 8077865, 12924584, 16155730, 25849168, 32311460, 64622920, 129245840]

約数ペア:

[(1, 129245840), (2, 64622920), (4, 32311460), (5, 25849168), (8, 16155730), (10, 12924584), (16, 8077865), (20, 6462292), (40, 3231146), (80, 1615573), (809, 159760), (1618, 79880), (1997, 64720), (3236, 39940), (3994, 32360), (4045, 31952), (6472, 19970), (7988, 16180), (8090, 15976), (9985, 12944)]