640147696

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{20849}}^1$

素因数の和:20977

約数の個数: 40

約数和(自身を含む): 1318554000

約数和(自身を除く): 678406304

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 101, 152, 202, 304, 404, 808, 1616, 1919, 3838, 7676, 15352, 20849, 30704, 41698, 83396, 166792, 333584, 396131, 792262, 1584524, 2105749, 3169048, 4211498, 6338096, 8422996, 16845992, 33691984, 40009231, 80018462, 160036924, 320073848, 640147696]

約数ペア:

[(1, 640147696), (2, 320073848), (4, 160036924), (8, 80018462), (16, 40009231), (19, 33691984), (38, 16845992), (76, 8422996), (101, 6338096), (152, 4211498), (202, 3169048), (304, 2105749), (404, 1584524), (808, 792262), (1616, 396131), (1919, 333584), (3838, 166792), (7676, 83396), (15352, 41698), (20849, 30704)]