18995720

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{1987}}^1$

素因数の和:2237

約数の個数: 32

約数和(自身を含む): 42940800

約数和(自身を除く): 23945080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 478, 956, 1195, 1912, 1987, 2390, 3974, 4780, 7948, 9560, 9935, 15896, 19870, 39740, 79480, 474893, 949786, 1899572, 2374465, 3799144, 4748930, 9497860, 18995720]

約数ペア:

[(1, 18995720), (2, 9497860), (4, 4748930), (5, 3799144), (8, 2374465), (10, 1899572), (20, 949786), (40, 474893), (239, 79480), (478, 39740), (956, 19870), (1195, 15896), (1912, 9935), (1987, 9560), (2390, 7948), (3974, 4780)]