20139880

素因数分解:

$2^3\times 5^1\times {\mathrm{347}}^1\times {\mathrm{1451}}^1$

素因数の和:1809

約数の個数: 32

約数和(自身を含む): 45476640

約数和(自身を除く): 25336760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 347, 694, 1388, 1451, 1735, 2776, 2902, 3470, 5804, 6940, 7255, 11608, 13880, 14510, 29020, 58040, 503497, 1006994, 2013988, 2517485, 4027976, 5034970, 10069940, 20139880]

約数ペア:

[(1, 20139880), (2, 10069940), (4, 5034970), (5, 4027976), (8, 2517485), (10, 2013988), (20, 1006994), (40, 503497), (347, 58040), (694, 29020), (1388, 14510), (1451, 13880), (1735, 11608), (2776, 7255), (2902, 6940), (3470, 5804)]