20540140

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{191}}^1\times {\mathrm{283}}^1$

素因数の和:502

約数の個数: 48

約数和(自身を含む): 45803520

約数和(自身を除く): 25263380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 191, 283, 380, 382, 566, 764, 955, 1132, 1415, 1910, 2830, 3629, 3820, 5377, 5660, 7258, 10754, 14516, 18145, 21508, 26885, 36290, 53770, 54053, 72580, 107540, 108106, 216212, 270265, 540530, 1027007, 1081060, 2054014, 4108028, 5135035, 10270070, 20540140]

約数ペア:

[(1, 20540140), (2, 10270070), (4, 5135035), (5, 4108028), (10, 2054014), (19, 1081060), (20, 1027007), (38, 540530), (76, 270265), (95, 216212), (190, 108106), (191, 107540), (283, 72580), (380, 54053), (382, 53770), (566, 36290), (764, 26885), (955, 21508), (1132, 18145), (1415, 14516), (1910, 10754), (2830, 7258), (3629, 5660), (3820, 5377)]