21375459

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{7219}}^1$

素因数の和:7279

約数の個数: 24

約数和(自身を含む): 36042240

約数和(自身を除く): 14666781

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 7219, 21657, 50533, 64971, 151599, 339293, 454797, 1017879, 2375051, 3053637, 7125153, 21375459]

約数ペア:

[(1, 21375459), (3, 7125153), (7, 3053637), (9, 2375051), (21, 1017879), (47, 454797), (63, 339293), (141, 151599), (329, 64971), (423, 50533), (987, 21657), (2961, 7219)]