20185940

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{239}}^1$

素因数の和:392

約数の個数: 48

約数和(自身を含む): 44029440

約数和(自身を除く): 23843500

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 103, 164, 205, 206, 239, 410, 412, 478, 515, 820, 956, 1030, 1195, 2060, 2390, 4223, 4780, 8446, 9799, 16892, 19598, 21115, 24617, 39196, 42230, 48995, 49234, 84460, 97990, 98468, 123085, 195980, 246170, 492340, 1009297, 2018594, 4037188, 5046485, 10092970, 20185940]

約数ペア:

[(1, 20185940), (2, 10092970), (4, 5046485), (5, 4037188), (10, 2018594), (20, 1009297), (41, 492340), (82, 246170), (103, 195980), (164, 123085), (205, 98468), (206, 97990), (239, 84460), (410, 49234), (412, 48995), (478, 42230), (515, 39196), (820, 24617), (956, 21115), (1030, 19598), (1195, 16892), (2060, 9799), (2390, 8446), (4223, 4780)]