20186980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{1031}}^1$

素因数の和:1140

約数の個数: 48

約数和(自身を含む): 46811520

約数和(自身を除く): 26624540

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 890, 979, 1031, 1780, 1958, 2062, 3916, 4124, 4895, 5155, 9790, 10310, 11341, 19580, 20620, 22682, 45364, 56705, 91759, 113410, 183518, 226820, 367036, 458795, 917590, 1009349, 1835180, 2018698, 4037396, 5046745, 10093490, 20186980]

約数ペア:

[(1, 20186980), (2, 10093490), (4, 5046745), (5, 4037396), (10, 2018698), (11, 1835180), (20, 1009349), (22, 917590), (44, 458795), (55, 367036), (89, 226820), (110, 183518), (178, 113410), (220, 91759), (356, 56705), (445, 45364), (890, 22682), (979, 20620), (1031, 19580), (1780, 11341), (1958, 10310), (2062, 9790), (3916, 5155), (4124, 4895)]