40646420

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{4969}}^1$

素因数の和:5387

約数の個数: 24

約数和(自身を含む): 85583400

約数和(自身を除く): 44936980

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 4090, 4969, 8180, 9938, 19876, 24845, 49690, 99380, 2032321, 4064642, 8129284, 10161605, 20323210, 40646420]

約数ペア:

[(1, 40646420), (2, 20323210), (4, 10161605), (5, 8129284), (10, 4064642), (20, 2032321), (409, 99380), (818, 49690), (1636, 24845), (2045, 19876), (4090, 9938), (4969, 8180)]