128716220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{156971}}^1$

素因数の和:157021

約数の個数: 24

約数和(自身を含む): 276898608

約数和(自身を除く): 148182388

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 156971, 313942, 627884, 784855, 1569710, 3139420, 6435811, 12871622, 25743244, 32179055, 64358110, 128716220]

約数ペア:

[(1, 128716220), (2, 64358110), (4, 32179055), (5, 25743244), (10, 12871622), (20, 6435811), (41, 3139420), (82, 1569710), (164, 784855), (205, 627884), (410, 313942), (820, 156971)]