21085257

素因数分解:

$3^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1\times {\mathrm{503}}^1$

素因数の和:752

約数の個数: 16

約数和(自身を含む): 28667520

約数和(自身を除く): 7582263

約数列:

[1, 3, 89, 157, 267, 471, 503, 1509, 13973, 41919, 44767, 78971, 134301, 236913, 7028419, 21085257]

約数ペア:

[(1, 21085257), (3, 7028419), (89, 236913), (157, 134301), (267, 78971), (471, 44767), (503, 41919), (1509, 13973)]