20902940

素因数分解:

$2^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{4373}}^1$

素因数の和:4621

約数の個数: 24

約数和(自身を含む): 44089920

約数和(自身を除く): 23186980

約数列:

[1, 2, 4, 5, 10, 20, 239, 478, 956, 1195, 2390, 4373, 4780, 8746, 17492, 21865, 43730, 87460, 1045147, 2090294, 4180588, 5225735, 10451470, 20902940]

約数ペア:

[(1, 20902940), (2, 10451470), (4, 5225735), (5, 4180588), (10, 2090294), (20, 1045147), (239, 87460), (478, 43730), (956, 21865), (1195, 17492), (2390, 8746), (4373, 4780)]