21895660

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{64399}}^1$

素因数の和:64425

約数の個数: 24

約数和(自身を含む): 48686400

約数和(自身を除く): 26790740

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 64399, 128798, 257596, 321995, 643990, 1094783, 1287980, 2189566, 4379132, 5473915, 10947830, 21895660]

約数ペア:

[(1, 21895660), (2, 10947830), (4, 5473915), (5, 4379132), (10, 2189566), (17, 1287980), (20, 1094783), (34, 643990), (68, 321995), (85, 257596), (170, 128798), (340, 64399)]