21993321

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{22283}}^1$

素因数の和:22340

約数の個数: 16

約数和(自身を含む): 34228224

約数和(自身を除く): 12234903

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 22283, 66849, 155981, 467943, 1047301, 3141903, 7331107, 21993321]

約数ペア:

[(1, 21993321), (3, 7331107), (7, 3141903), (21, 1047301), (47, 467943), (141, 155981), (329, 66849), (987, 22283)]