20718488

素因数分解:

$2^3\times 7^1\times {\mathrm{89}}^1\times {\mathrm{4157}}^1$

素因数の和:4259

約数の個数: 32

約数和(自身を含む): 44906400

約数和(自身を除く): 24187912

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 89, 178, 356, 623, 712, 1246, 2492, 4157, 4984, 8314, 16628, 29099, 33256, 58198, 116396, 232792, 369973, 739946, 1479892, 2589811, 2959784, 5179622, 10359244, 20718488]

約数ペア:

[(1, 20718488), (2, 10359244), (4, 5179622), (7, 2959784), (8, 2589811), (14, 1479892), (28, 739946), (56, 369973), (89, 232792), (178, 116396), (356, 58198), (623, 33256), (712, 29099), (1246, 16628), (2492, 8314), (4157, 4984)]