18385720

素因数分解:

$2^3\times 5^1\times {\mathrm{419}}^1\times {\mathrm{1097}}^1$

素因数の和:1527

約数の個数: 32

約数和(自身を含む): 41504400

約数和(自身を除く): 23118680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 419, 838, 1097, 1676, 2095, 2194, 3352, 4190, 4388, 5485, 8380, 8776, 10970, 16760, 21940, 43880, 459643, 919286, 1838572, 2298215, 3677144, 4596430, 9192860, 18385720]

約数ペア:

[(1, 18385720), (2, 9192860), (4, 4596430), (5, 3677144), (8, 2298215), (10, 1838572), (20, 919286), (40, 459643), (419, 43880), (838, 21940), (1097, 16760), (1676, 10970), (2095, 8776), (2194, 8380), (3352, 5485), (4190, 4388)]