19810015

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{10133}}^1$

素因数の和:10178

約数の個数: 16

約数和(自身を含む): 26267328

約数和(自身を除く): 6457313

約数列:

[1, 5, 17, 23, 85, 115, 391, 1955, 10133, 50665, 172261, 233059, 861305, 1165295, 3962003, 19810015]

約数ペア:

[(1, 19810015), (5, 3962003), (17, 1165295), (23, 861305), (85, 233059), (115, 172261), (391, 50665), (1955, 10133)]