19179920

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1217}}^1$

素因数の和:1427

約数の個数: 40

約数和(自身を含む): 44856504

約数和(自身を除く): 25676584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1217, 1576, 1970, 2434, 3152, 3940, 4868, 6085, 7880, 9736, 12170, 15760, 19472, 24340, 48680, 97360, 239749, 479498, 958996, 1198745, 1917992, 2397490, 3835984, 4794980, 9589960, 19179920]

約数ペア:

[(1, 19179920), (2, 9589960), (4, 4794980), (5, 3835984), (8, 2397490), (10, 1917992), (16, 1198745), (20, 958996), (40, 479498), (80, 239749), (197, 97360), (394, 48680), (788, 24340), (985, 19472), (1217, 15760), (1576, 12170), (1970, 9736), (2434, 7880), (3152, 6085), (3940, 4868)]