81508040

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{55073}}^1$

素因数の和:55121

約数の個数: 32

約数和(自身を含む): 188353080

約数和(自身を除く): 106845040

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 55073, 110146, 220292, 275365, 440584, 550730, 1101460, 2037701, 2202920, 4075402, 8150804, 10188505, 16301608, 20377010, 40754020, 81508040]

約数ペア:

[(1, 81508040), (2, 40754020), (4, 20377010), (5, 16301608), (8, 10188505), (10, 8150804), (20, 4075402), (37, 2202920), (40, 2037701), (74, 1101460), (148, 550730), (185, 440584), (296, 275365), (370, 220292), (740, 110146), (1480, 55073)]