21025893

素因数分解:

$3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{7643}}^1$

素因数の和:7784

約数の個数: 16

約数和(自身を含む): 32288256

約数和(自身を除く): 11262363

約数列:

[1, 3, 7, 21, 131, 393, 917, 2751, 7643, 22929, 53501, 160503, 1001233, 3003699, 7008631, 21025893]

約数ペア:

[(1, 21025893), (3, 7008631), (7, 3003699), (21, 1001233), (131, 160503), (393, 53501), (917, 22929), (2751, 7643)]