18758440

素因数分解:

$2^3\times 5^1\times {\mathrm{277}}^1\times {\mathrm{1693}}^1$

素因数の和:1981

約数の個数: 32

約数和(自身を含む): 42383880

約数和(自身を除く): 23625440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 277, 554, 1108, 1385, 1693, 2216, 2770, 3386, 5540, 6772, 8465, 11080, 13544, 16930, 33860, 67720, 468961, 937922, 1875844, 2344805, 3751688, 4689610, 9379220, 18758440]

約数ペア:

[(1, 18758440), (2, 9379220), (4, 4689610), (5, 3751688), (8, 2344805), (10, 1875844), (20, 937922), (40, 468961), (277, 67720), (554, 33860), (1108, 16930), (1385, 13544), (1693, 11080), (2216, 8465), (2770, 6772), (3386, 5540)]