20177102589

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1\times {\mathrm{193}}^1\times {\mathrm{857}}^1$

素因数の和:1254

約数の個数: 64

約数和(自身を含む): 31980089856

約数和(自身を除く): 11802987267

約数列:

[1, 3, 7, 21, 37, 111, 157, 193, 259, 471, 579, 777, 857, 1099, 1351, 2571, 3297, 4053, 5809, 5999, 7141, 17427, 17997, 21423, 30301, 31709, 40663, 49987, 90903, 95127, 121989, 134549, 149961, 165401, 212107, 221963, 403647, 496203, 636321, 665889, 941843, 1121137, 1157807, 2825529, 3363411, 3473421, 4978313, 6119837, 7847959, 14934939, 18359511, 23543877, 25967957, 34848191, 42838859, 77903871, 104544573, 128516577, 181775699, 545327097, 960814409, 2882443227, 6725700863, 20177102589]

約数ペア:

[(1, 20177102589), (3, 6725700863), (7, 2882443227), (21, 960814409), (37, 545327097), (111, 181775699), (157, 128516577), (193, 104544573), (259, 77903871), (471, 42838859), (579, 34848191), (777, 25967957), (857, 23543877), (1099, 18359511), (1351, 14934939), (2571, 7847959), (3297, 6119837), (4053, 4978313), (5809, 3473421), (5999, 3363411), (7141, 2825529), (17427, 1157807), (17997, 1121137), (21423, 941843), (30301, 665889), (31709, 636321), (40663, 496203), (49987, 403647), (90903, 221963), (95127, 212107), (121989, 165401), (134549, 149961)]