21011556

素因数分解:

$2^2\times 3^1\times {\mathrm{659}}^1\times {\mathrm{2657}}^1$

素因数の和:3323

約数の個数: 24

約数和(自身を含む): 49119840

約数和(自身を除く): 28108284

約数列:

[1, 2, 3, 4, 6, 12, 659, 1318, 1977, 2636, 2657, 3954, 5314, 7908, 7971, 10628, 15942, 31884, 1750963, 3501926, 5252889, 7003852, 10505778, 21011556]

約数ペア:

[(1, 21011556), (2, 10505778), (3, 7003852), (4, 5252889), (6, 3501926), (12, 1750963), (659, 31884), (1318, 15942), (1977, 10628), (2636, 7971), (2657, 7908), (3954, 5314)]