20919928

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{1523}}^1$

素因数の和:1647

約数の個数: 32

約数和(自身を含む): 41970960

約数和(自身を除く): 21051032

約数列:

[1, 2, 4, 8, 17, 34, 68, 101, 136, 202, 404, 808, 1523, 1717, 3046, 3434, 6092, 6868, 12184, 13736, 25891, 51782, 103564, 153823, 207128, 307646, 615292, 1230584, 2614991, 5229982, 10459964, 20919928]

約数ペア:

[(1, 20919928), (2, 10459964), (4, 5229982), (8, 2614991), (17, 1230584), (34, 615292), (68, 307646), (101, 207128), (136, 153823), (202, 103564), (404, 51782), (808, 25891), (1523, 13736), (1717, 12184), (3046, 6868), (3434, 6092)]