19891888

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{30323}}^1$

素因数の和:30372

約数の個数: 20

約数和(自身を含む): 39481848

約数和(自身を除く): 19589960

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 30323, 60646, 121292, 242584, 485168, 1243243, 2486486, 4972972, 9945944, 19891888]

約数ペア:

[(1, 19891888), (2, 9945944), (4, 4972972), (8, 2486486), (16, 1243243), (41, 485168), (82, 242584), (164, 121292), (328, 60646), (656, 30323)]