21881601

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{20431}}^1$

素因数の和:20461

約数の個数: 24

約数和(自身を含む): 38248704

約数和(自身を除く): 16367103

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 20431, 61293, 143017, 183879, 347327, 429051, 1041981, 1287153, 2431289, 3125943, 7293867, 21881601]

約数ペア:

[(1, 21881601), (3, 7293867), (7, 3125943), (9, 2431289), (17, 1287153), (21, 1041981), (51, 429051), (63, 347327), (119, 183879), (153, 143017), (357, 61293), (1071, 20431)]