20694050

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:148

約数の個数: 72

約数和(自身を含む): 43568640

約数和(自身を除く): 22874590

約数列:

[1, 2, 5, 10, 13, 25, 26, 31, 50, 62, 65, 79, 130, 155, 158, 169, 310, 325, 338, 395, 403, 650, 775, 790, 806, 845, 1027, 1550, 1690, 1975, 2015, 2054, 2449, 3950, 4030, 4225, 4898, 5135, 5239, 8450, 10075, 10270, 10478, 12245, 13351, 20150, 24490, 25675, 26195, 26702, 31837, 51350, 52390, 61225, 63674, 66755, 122450, 130975, 133510, 159185, 261950, 318370, 333775, 413881, 667550, 795925, 827762, 1591850, 2069405, 4138810, 10347025, 20694050]

約数ペア:

[(1, 20694050), (2, 10347025), (5, 4138810), (10, 2069405), (13, 1591850), (25, 827762), (26, 795925), (31, 667550), (50, 413881), (62, 333775), (65, 318370), (79, 261950), (130, 159185), (155, 133510), (158, 130975), (169, 122450), (310, 66755), (325, 63674), (338, 61225), (395, 52390), (403, 51350), (650, 31837), (775, 26702), (790, 26195), (806, 25675), (845, 24490), (1027, 20150), (1550, 13351), (1690, 12245), (1975, 10478), (2015, 10270), (2054, 10075), (2449, 8450), (3950, 5239), (4030, 5135), (4225, 4898)]