40780420

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{3181}}^1$

素因数の和:3831

約数の個数: 24

約数和(自身を含む): 85799448

約数和(自身を除く): 45019028

約数列:

[1, 2, 4, 5, 10, 20, 641, 1282, 2564, 3181, 3205, 6362, 6410, 12724, 12820, 15905, 31810, 63620, 2039021, 4078042, 8156084, 10195105, 20390210, 40780420]

約数ペア:

[(1, 40780420), (2, 20390210), (4, 10195105), (5, 8156084), (10, 4078042), (20, 2039021), (641, 63620), (1282, 31810), (2564, 15905), (3181, 12820), (3205, 12724), (6362, 6410)]