20412155

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{197}}^1$

素因数の和:295

約数の個数: 32

約数和(自身を含む): 27713664

約数和(自身を除く): 7301509

約数列:

[1, 5, 17, 23, 53, 85, 115, 197, 265, 391, 901, 985, 1219, 1955, 3349, 4505, 4531, 6095, 10441, 16745, 20723, 22655, 52205, 77027, 103615, 177497, 240143, 385135, 887485, 1200715, 4082431, 20412155]

約数ペア:

[(1, 20412155), (5, 4082431), (17, 1200715), (23, 887485), (53, 385135), (85, 240143), (115, 177497), (197, 103615), (265, 77027), (391, 52205), (901, 22655), (985, 20723), (1219, 16745), (1955, 10441), (3349, 6095), (4505, 4531)]