20131120

素因数分解:

$2^4\times 5^1\times {\mathrm{251639}}^1$

素因数の和:251652

約数の個数: 20

約数和(自身を含む): 46805040

約数和(自身を除く): 26673920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251639, 503278, 1006556, 1258195, 2013112, 2516390, 4026224, 5032780, 10065560, 20131120]

約数ペア:

[(1, 20131120), (2, 10065560), (4, 5032780), (5, 4026224), (8, 2516390), (10, 2013112), (16, 1258195), (20, 1006556), (40, 503278), (80, 251639)]