20720856

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{66413}}^1$

素因数の和:66435

約数の個数: 32

約数和(自身を含む): 55787760

約数和(自身を除く): 35066904

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 78, 104, 156, 312, 66413, 132826, 199239, 265652, 398478, 531304, 796956, 863369, 1593912, 1726738, 2590107, 3453476, 5180214, 6906952, 10360428, 20720856]

約数ペア:

[(1, 20720856), (2, 10360428), (3, 6906952), (4, 5180214), (6, 3453476), (8, 2590107), (12, 1726738), (13, 1593912), (24, 863369), (26, 796956), (39, 531304), (52, 398478), (78, 265652), (104, 199239), (156, 132826), (312, 66413)]