21117856

素因数分解:

$2^5\times {\mathrm{83}}^1\times {\mathrm{7951}}^1$

素因数の和:8044

約数の個数: 24

約数和(自身を含む): 42081984

約数和(自身を除く): 20964128

約数列:

[1, 2, 4, 8, 16, 32, 83, 166, 332, 664, 1328, 2656, 7951, 15902, 31804, 63608, 127216, 254432, 659933, 1319866, 2639732, 5279464, 10558928, 21117856]

約数ペア:

[(1, 21117856), (2, 10558928), (4, 5279464), (8, 2639732), (16, 1319866), (32, 659933), (83, 254432), (166, 127216), (332, 63608), (664, 31804), (1328, 15902), (2656, 7951)]