21280805

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{46771}}^1$

素因数の和:46796

約数の個数: 16

約数和(自身を含む): 31430784

約数和(自身を除く): 10149979

約数列:

[1, 5, 7, 13, 35, 65, 91, 455, 46771, 233855, 327397, 608023, 1636985, 3040115, 4256161, 21280805]

約数ペア:

[(1, 21280805), (5, 4256161), (7, 3040115), (13, 1636985), (35, 608023), (65, 327397), (91, 233855), (455, 46771)]