20384870

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{991}}^1$

素因数の和:1037

約数の個数: 48

約数和(自身を含む): 42747264

約数和(自身を除く): 22362394

約数列:

[1, 2, 5, 10, 11, 17, 22, 34, 55, 85, 110, 121, 170, 187, 242, 374, 605, 935, 991, 1210, 1870, 1982, 2057, 4114, 4955, 9910, 10285, 10901, 16847, 20570, 21802, 33694, 54505, 84235, 109010, 119911, 168470, 185317, 239822, 370634, 599555, 926585, 1199110, 1853170, 2038487, 4076974, 10192435, 20384870]

約数ペア:

[(1, 20384870), (2, 10192435), (5, 4076974), (10, 2038487), (11, 1853170), (17, 1199110), (22, 926585), (34, 599555), (55, 370634), (85, 239822), (110, 185317), (121, 168470), (170, 119911), (187, 109010), (242, 84235), (374, 54505), (605, 33694), (935, 21802), (991, 20570), (1210, 16847), (1870, 10901), (1982, 10285), (2057, 9910), (4114, 4955)]