20731660

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{613}}^1$

素因数の和:730

約数の個数: 48

約数和(自身を含む): 46418400

約数和(自身を除く): 25686740

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 89, 95, 178, 190, 356, 380, 445, 613, 890, 1226, 1691, 1780, 2452, 3065, 3382, 6130, 6764, 8455, 11647, 12260, 16910, 23294, 33820, 46588, 54557, 58235, 109114, 116470, 218228, 232940, 272785, 545570, 1036583, 1091140, 2073166, 4146332, 5182915, 10365830, 20731660]

約数ペア:

[(1, 20731660), (2, 10365830), (4, 5182915), (5, 4146332), (10, 2073166), (19, 1091140), (20, 1036583), (38, 545570), (76, 272785), (89, 232940), (95, 218228), (178, 116470), (190, 109114), (356, 58235), (380, 54557), (445, 46588), (613, 33820), (890, 23294), (1226, 16910), (1691, 12260), (1780, 11647), (2452, 8455), (3065, 6764), (3382, 6130)]