81660340

素因数分解:

$2^2\times 5^1\times {\mathrm{251}}^1\times {\mathrm{16267}}^1$

素因数の和:16527

約数の個数: 24

約数和(自身を含む): 172180512

約数和(自身を除く): 90520172

約数列:

[1, 2, 4, 5, 10, 20, 251, 502, 1004, 1255, 2510, 5020, 16267, 32534, 65068, 81335, 162670, 325340, 4083017, 8166034, 16332068, 20415085, 40830170, 81660340]

約数ペア:

[(1, 81660340), (2, 40830170), (4, 20415085), (5, 16332068), (10, 8166034), (20, 4083017), (251, 325340), (502, 162670), (1004, 81335), (1255, 65068), (2510, 32534), (5020, 16267)]