20782568

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 42273900

約数和(自身を除く): 21491332

約数列:

[1, 2, 4, 8, 17, 34, 68, 89, 101, 136, 178, 202, 289, 356, 404, 578, 712, 808, 1156, 1513, 1717, 2312, 3026, 3434, 6052, 6868, 8989, 12104, 13736, 17978, 25721, 29189, 35956, 51442, 58378, 71912, 102884, 116756, 152813, 205768, 233512, 305626, 611252, 1222504, 2597821, 5195642, 10391284, 20782568]

約数ペア:

[(1, 20782568), (2, 10391284), (4, 5195642), (8, 2597821), (17, 1222504), (34, 611252), (68, 305626), (89, 233512), (101, 205768), (136, 152813), (178, 116756), (202, 102884), (289, 71912), (356, 58378), (404, 51442), (578, 35956), (712, 29189), (808, 25721), (1156, 17978), (1513, 13736), (1717, 12104), (2312, 8989), (3026, 6868), (3434, 6052)]