20019080

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{113}}^1$

素因数の和:270

約数の個数: 64

約数和(自身を含む): 46949760

約数和(自身を除く): 26930680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 103, 113, 172, 206, 215, 226, 344, 412, 430, 452, 515, 565, 824, 860, 904, 1030, 1130, 1720, 2060, 2260, 4120, 4429, 4520, 4859, 8858, 9718, 11639, 17716, 19436, 22145, 23278, 24295, 35432, 38872, 44290, 46556, 48590, 58195, 88580, 93112, 97180, 116390, 177160, 194360, 232780, 465560, 500477, 1000954, 2001908, 2502385, 4003816, 5004770, 10009540, 20019080]

約数ペア:

[(1, 20019080), (2, 10009540), (4, 5004770), (5, 4003816), (8, 2502385), (10, 2001908), (20, 1000954), (40, 500477), (43, 465560), (86, 232780), (103, 194360), (113, 177160), (172, 116390), (206, 97180), (215, 93112), (226, 88580), (344, 58195), (412, 48590), (430, 46556), (452, 44290), (515, 38872), (565, 35432), (824, 24295), (860, 23278), (904, 22145), (1030, 19436), (1130, 17716), (1720, 11639), (2060, 9718), (2260, 8858), (4120, 4859), (4429, 4520)]