218620

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{643}}^1$

素因数の和:669

約数の個数: 24

約数和(自身を含む): 486864

約数和(自身を除く): 268244

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 643, 1286, 2572, 3215, 6430, 10931, 12860, 21862, 43724, 54655, 109310, 218620]

約数ペア:

[(1, 218620), (2, 109310), (4, 54655), (5, 43724), (10, 21862), (17, 12860), (20, 10931), (34, 6430), (68, 3215), (85, 2572), (170, 1286), (340, 643)]