81806960

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{6863}}^1$

素因数の和:7025

約数の個数: 40

約数和(自身を含む): 191505600

約数和(自身を除く): 109698640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 2384, 2980, 5960, 6863, 11920, 13726, 27452, 34315, 54904, 68630, 109808, 137260, 274520, 549040, 1022587, 2045174, 4090348, 5112935, 8180696, 10225870, 16361392, 20451740, 40903480, 81806960]

約数ペア:

[(1, 81806960), (2, 40903480), (4, 20451740), (5, 16361392), (8, 10225870), (10, 8180696), (16, 5112935), (20, 4090348), (40, 2045174), (80, 1022587), (149, 549040), (298, 274520), (596, 137260), (745, 109808), (1192, 68630), (1490, 54904), (2384, 34315), (2980, 27452), (5960, 13726), (6863, 11920)]