20784788080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{194323}}^1$

素因数の和:194534

約数の個数: 80

約数和(自身を含む): 55517589504

約数和(自身を除く): 34732801424

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 191, 280, 382, 560, 764, 955, 1337, 1528, 1910, 2674, 3056, 3820, 5348, 6685, 7640, 10696, 13370, 15280, 21392, 26740, 53480, 106960, 194323, 388646, 777292, 971615, 1360261, 1554584, 1943230, 2720522, 3109168, 3886460, 5441044, 6801305, 7772920, 10882088, 13602610, 15545840, 21764176, 27205220, 37115693, 54410440, 74231386, 108820880, 148462772, 185578465, 259809851, 296925544, 371156930, 519619702, 593851088, 742313860, 1039239404, 1299049255, 1484627720, 2078478808, 2598098510, 2969255440, 4156957616, 5196197020, 10392394040, 20784788080]

約数ペア:

[(1, 20784788080), (2, 10392394040), (4, 5196197020), (5, 4156957616), (7, 2969255440), (8, 2598098510), (10, 2078478808), (14, 1484627720), (16, 1299049255), (20, 1039239404), (28, 742313860), (35, 593851088), (40, 519619702), (56, 371156930), (70, 296925544), (80, 259809851), (112, 185578465), (140, 148462772), (191, 108820880), (280, 74231386), (382, 54410440), (560, 37115693), (764, 27205220), (955, 21764176), (1337, 15545840), (1528, 13602610), (1910, 10882088), (2674, 7772920), (3056, 6801305), (3820, 5441044), (5348, 3886460), (6685, 3109168), (7640, 2720522), (10696, 1943230), (13370, 1554584), (15280, 1360261), (21392, 971615), (26740, 777292), (53480, 388646), (106960, 194323)]