21638864

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{104033}}^1$

素因数の和:104054

約数の個数: 20

約数和(自身を含む): 45150756

約数和(自身を除く): 23511892

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 104033, 208066, 416132, 832264, 1352429, 1664528, 2704858, 5409716, 10819432, 21638864]

約数ペア:

[(1, 21638864), (2, 10819432), (4, 5409716), (8, 2704858), (13, 1664528), (16, 1352429), (26, 832264), (52, 416132), (104, 208066), (208, 104033)]