21182921

素因数分解:

${\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:272

約数の個数: 16

約数和(自身を含む): 22462848

約数和(自身を除く): 1279927

約数列:

[1, 61, 67, 71, 73, 4087, 4331, 4453, 4757, 4891, 5183, 290177, 298351, 316163, 347261, 21182921]

約数ペア:

[(1, 21182921), (61, 347261), (67, 316163), (71, 298351), (73, 290177), (4087, 5183), (4331, 4891), (4453, 4757)]