81190420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{213659}}^1$

素因数の和:213687

約数の個数: 24

約数和(自身を含む): 179474400

約数和(自身を除く): 98283980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 213659, 427318, 854636, 1068295, 2136590, 4059521, 4273180, 8119042, 16238084, 20297605, 40595210, 81190420]

約数ペア:

[(1, 81190420), (2, 40595210), (4, 20297605), (5, 16238084), (10, 8119042), (19, 4273180), (20, 4059521), (38, 2136590), (76, 1068295), (95, 854636), (190, 427318), (380, 213659)]