19937155

素因数分解:

$5^1\times 7^1\times {\mathrm{71}}^2\times {\mathrm{113}}^1$

素因数の和:267

約数の個数: 24

約数和(自身を含む): 27978336

約数和(自身を除く): 8041181

約数列:

[1, 5, 7, 35, 71, 113, 355, 497, 565, 791, 2485, 3955, 5041, 8023, 25205, 35287, 40115, 56161, 176435, 280805, 569633, 2848165, 3987431, 19937155]

約数ペア:

[(1, 19937155), (5, 3987431), (7, 2848165), (35, 569633), (71, 280805), (113, 176435), (355, 56161), (497, 40115), (565, 35287), (791, 25205), (2485, 8023), (3955, 5041)]