81488720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53611}}^1$

素因数の和:53643

約数の個数: 40

約数和(自身を含む): 199436640

約数和(自身を除く): 117947920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 53611, 107222, 214444, 268055, 428888, 536110, 857776, 1018609, 1072220, 2037218, 2144440, 4074436, 4288880, 5093045, 8148872, 10186090, 16297744, 20372180, 40744360, 81488720]

約数ペア:

[(1, 81488720), (2, 40744360), (4, 20372180), (5, 16297744), (8, 10186090), (10, 8148872), (16, 5093045), (19, 4288880), (20, 4074436), (38, 2144440), (40, 2037218), (76, 1072220), (80, 1018609), (95, 857776), (152, 536110), (190, 428888), (304, 268055), (380, 214444), (760, 107222), (1520, 53611)]