21990959965

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{167}}^1\times {\mathrm{34337}}^1$

素因数の和:34581

約数の個数: 32

約数和(自身を含む): 29074671360

約数和(自身を除く): 7083711395

約数列:

[1, 5, 13, 59, 65, 167, 295, 767, 835, 2171, 3835, 9853, 10855, 34337, 49265, 128089, 171685, 446381, 640445, 2025883, 2231905, 5734279, 10129415, 26336479, 28671395, 74545627, 131682395, 338322461, 372728135, 1691612305, 4398191993, 21990959965]

約数ペア:

[(1, 21990959965), (5, 4398191993), (13, 1691612305), (59, 372728135), (65, 338322461), (167, 131682395), (295, 74545627), (767, 28671395), (835, 26336479), (2171, 10129415), (3835, 5734279), (9853, 2231905), (10855, 2025883), (34337, 640445), (49265, 446381), (128089, 171685)]