21639352

素因数分解:

$2^3\times 7^1\times {\mathrm{491}}^1\times {\mathrm{787}}^1$

素因数の和:1291

約数の個数: 32

約数和(自身を含む): 46523520

約数和(自身を除く): 24884168

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 491, 787, 982, 1574, 1964, 3148, 3437, 3928, 5509, 6296, 6874, 11018, 13748, 22036, 27496, 44072, 386417, 772834, 1545668, 2704919, 3091336, 5409838, 10819676, 21639352]

約数ペア:

[(1, 21639352), (2, 10819676), (4, 5409838), (7, 3091336), (8, 2704919), (14, 1545668), (28, 772834), (56, 386417), (491, 44072), (787, 27496), (982, 22036), (1574, 13748), (1964, 11018), (3148, 6874), (3437, 6296), (3928, 5509)]