19981171

素因数分解:

$7^2\times {\mathrm{17}}^3\times {\mathrm{83}}^1$

素因数の和:148

約数の個数: 24

約数和(自身を含む): 24993360

約数和(自身を除く): 5012189

約数列:

[1, 7, 17, 49, 83, 119, 289, 581, 833, 1411, 2023, 4067, 4913, 9877, 14161, 23987, 34391, 69139, 167909, 240737, 407779, 1175363, 2854453, 19981171]

約数ペア:

[(1, 19981171), (7, 2854453), (17, 1175363), (49, 407779), (83, 240737), (119, 167909), (289, 69139), (581, 34391), (833, 23987), (1411, 14161), (2023, 9877), (4067, 4913)]