21123656

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{1223}}^1$

素因数の和:1373

約数の個数: 32

約数和(自身を含む): 42301440

約数和(自身を除く): 21177784

約数列:

[1, 2, 4, 8, 17, 34, 68, 127, 136, 254, 508, 1016, 1223, 2159, 2446, 4318, 4892, 8636, 9784, 17272, 20791, 41582, 83164, 155321, 166328, 310642, 621284, 1242568, 2640457, 5280914, 10561828, 21123656]

約数ペア:

[(1, 21123656), (2, 10561828), (4, 5280914), (8, 2640457), (17, 1242568), (34, 621284), (68, 310642), (127, 166328), (136, 155321), (254, 83164), (508, 41582), (1016, 20791), (1223, 17272), (2159, 9784), (2446, 8636), (4318, 4892)]