20968680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{197}}^1\times {\mathrm{887}}^1$

素因数の和:1098

約数の個数: 64

約数和(自身を含む): 63296640

約数和(自身を除く): 42327960

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 197, 394, 591, 788, 887, 985, 1182, 1576, 1774, 1970, 2364, 2661, 2955, 3548, 3940, 4435, 4728, 5322, 5910, 7096, 7880, 8870, 10644, 11820, 13305, 17740, 21288, 23640, 26610, 35480, 53220, 106440, 174739, 349478, 524217, 698956, 873695, 1048434, 1397912, 1747390, 2096868, 2621085, 3494780, 4193736, 5242170, 6989560, 10484340, 20968680]

約数ペア:

[(1, 20968680), (2, 10484340), (3, 6989560), (4, 5242170), (5, 4193736), (6, 3494780), (8, 2621085), (10, 2096868), (12, 1747390), (15, 1397912), (20, 1048434), (24, 873695), (30, 698956), (40, 524217), (60, 349478), (120, 174739), (197, 106440), (394, 53220), (591, 35480), (788, 26610), (887, 23640), (985, 21288), (1182, 17740), (1576, 13305), (1774, 11820), (1970, 10644), (2364, 8870), (2661, 7880), (2955, 7096), (3548, 5910), (3940, 5322), (4435, 4728)]