21807991

素因数分解:

${\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{631}}^1$

素因数の和:774

約数の個数: 16

約数和(自身を含む): 24572160

約数和(自身を除く): 2764169

約数列:

[1, 17, 19, 107, 323, 631, 1819, 2033, 10727, 11989, 34561, 67517, 203813, 1147789, 1282823, 21807991]

約数ペア:

[(1, 21807991), (17, 1282823), (19, 1147789), (107, 203813), (323, 67517), (631, 34561), (1819, 11989), (2033, 10727)]