21865264

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{80387}}^1$

素因数の和:80412

約数の個数: 20

約数和(自身を含む): 44856504

約数和(自身を除く): 22991240

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 80387, 160774, 321548, 643096, 1286192, 1366579, 2733158, 5466316, 10932632, 21865264]

約数ペア:

[(1, 21865264), (2, 10932632), (4, 5466316), (8, 2733158), (16, 1366579), (17, 1286192), (34, 643096), (68, 321548), (136, 160774), (272, 80387)]