21160208

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{19739}}^1$

素因数の和:19814

約数の個数: 20

約数和(自身を含む): 41611920

約数和(自身を除く): 20451712

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 19739, 39478, 78956, 157912, 315824, 1322513, 2645026, 5290052, 10580104, 21160208]

約数ペア:

[(1, 21160208), (2, 10580104), (4, 5290052), (8, 2645026), (16, 1322513), (67, 315824), (134, 157912), (268, 78956), (536, 39478), (1072, 19739)]