20892880

素因数分解:

$2^4\times 5^1\times {\mathrm{179}}^1\times {\mathrm{1459}}^1$

素因数の和:1651

約数の個数: 40

約数和(自身を含む): 48880800

約数和(自身を除く): 27987920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 179, 358, 716, 895, 1432, 1459, 1790, 2864, 2918, 3580, 5836, 7160, 7295, 11672, 14320, 14590, 23344, 29180, 58360, 116720, 261161, 522322, 1044644, 1305805, 2089288, 2611610, 4178576, 5223220, 10446440, 20892880]

約数ペア:

[(1, 20892880), (2, 10446440), (4, 5223220), (5, 4178576), (8, 2611610), (10, 2089288), (16, 1305805), (20, 1044644), (40, 522322), (80, 261161), (179, 116720), (358, 58360), (716, 29180), (895, 23344), (1432, 14590), (1459, 14320), (1790, 11672), (2864, 7295), (2918, 7160), (3580, 5836)]