18800980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{457}}^1$

素因数の和:505

約数の個数: 72

約数和(自身を含む): 46050984

約数和(自身を除く): 27250004

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 121, 170, 187, 220, 242, 340, 374, 457, 484, 605, 748, 914, 935, 1210, 1828, 1870, 2057, 2285, 2420, 3740, 4114, 4570, 5027, 7769, 8228, 9140, 10054, 10285, 15538, 20108, 20570, 25135, 31076, 38845, 41140, 50270, 55297, 77690, 85459, 100540, 110594, 155380, 170918, 221188, 276485, 341836, 427295, 552970, 854590, 940049, 1105940, 1709180, 1880098, 3760196, 4700245, 9400490, 18800980]

約数ペア:

[(1, 18800980), (2, 9400490), (4, 4700245), (5, 3760196), (10, 1880098), (11, 1709180), (17, 1105940), (20, 940049), (22, 854590), (34, 552970), (44, 427295), (55, 341836), (68, 276485), (85, 221188), (110, 170918), (121, 155380), (170, 110594), (187, 100540), (220, 85459), (242, 77690), (340, 55297), (374, 50270), (457, 41140), (484, 38845), (605, 31076), (748, 25135), (914, 20570), (935, 20108), (1210, 15538), (1828, 10285), (1870, 10054), (2057, 9140), (2285, 8228), (2420, 7769), (3740, 5027), (4114, 4570)]