21691879

素因数分解:

${\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{223}}^1\times {\mathrm{239}}^1$

素因数の和:510

約数の個数: 16

約数和(自身を含む): 24514560

約数和(自身を除く): 2822681

約数列:

[1, 11, 37, 223, 239, 407, 2453, 2629, 8251, 8843, 53297, 90761, 97273, 586267, 1971989, 21691879]

約数ペア:

[(1, 21691879), (11, 1971989), (37, 586267), (223, 97273), (239, 90761), (407, 53297), (2453, 8843), (2629, 8251)]