289057960

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{71549}}^1$

素因数の和:71661

約数の個数: 32

約数和(自身を含む): 656829000

約数和(自身を除く): 367771040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 71549, 143098, 286196, 357745, 572392, 715490, 1430980, 2861960, 7226449, 14452898, 28905796, 36132245, 57811592, 72264490, 144528980, 289057960]

約数ペア:

[(1, 289057960), (2, 144528980), (4, 72264490), (5, 57811592), (8, 36132245), (10, 28905796), (20, 14452898), (40, 7226449), (101, 2861960), (202, 1430980), (404, 715490), (505, 572392), (808, 357745), (1010, 286196), (2020, 143098), (4040, 71549)]