21658917

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{2857}}^1$

素因数の和:2905

約数の個数: 24

約数和(自身を含む): 34844736

約数和(自身を除く): 13185819

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2527, 2857, 7581, 8571, 19999, 54283, 59997, 162849, 379981, 1031377, 1139943, 3094131, 7219639, 21658917]

約数ペア:

[(1, 21658917), (3, 7219639), (7, 3094131), (19, 1139943), (21, 1031377), (57, 379981), (133, 162849), (361, 59997), (399, 54283), (1083, 19999), (2527, 8571), (2857, 7581)]