81564040

素因数分解:

$2^3\times 5^1\times {\mathrm{241}}^1\times {\mathrm{8461}}^1$

素因数の和:8713

約数の個数: 32

約数和(自身を含む): 184302360

約数和(自身を除く): 102738320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 241, 482, 964, 1205, 1928, 2410, 4820, 8461, 9640, 16922, 33844, 42305, 67688, 84610, 169220, 338440, 2039101, 4078202, 8156404, 10195505, 16312808, 20391010, 40782020, 81564040]

約数ペア:

[(1, 81564040), (2, 40782020), (4, 20391010), (5, 16312808), (8, 10195505), (10, 8156404), (20, 4078202), (40, 2039101), (241, 338440), (482, 169220), (964, 84610), (1205, 67688), (1928, 42305), (2410, 33844), (4820, 16922), (8461, 9640)]