18980665

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{137}}^1\times {\mathrm{229}}^1$

素因数の和:393

約数の個数: 24

約数和(自身を含む): 25328520

約数和(自身を除く): 6347855

約数列:

[1, 5, 11, 55, 121, 137, 229, 605, 685, 1145, 1507, 2519, 7535, 12595, 16577, 27709, 31373, 82885, 138545, 156865, 345103, 1725515, 3796133, 18980665]

約数ペア:

[(1, 18980665), (5, 3796133), (11, 1725515), (55, 345103), (121, 156865), (137, 138545), (229, 82885), (605, 31373), (685, 27709), (1145, 16577), (1507, 12595), (2519, 7535)]