21887705

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{20173}}^1$

素因数の和:20216

約数の個数: 16

約数和(自身を含む): 30987264

約数和(自身を除く): 9099559

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 20173, 100865, 141211, 625363, 706055, 3126815, 4377541, 21887705]

約数ペア:

[(1, 21887705), (5, 4377541), (7, 3126815), (31, 706055), (35, 625363), (155, 141211), (217, 100865), (1085, 20173)]