21677215

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{19979}}^1$

素因数の和:20022

約数の個数: 16

約数和(自身を含む): 30689280

約数和(自身を除く): 9012065

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 19979, 99895, 139853, 619349, 699265, 3096745, 4335443, 21677215]

約数ペア:

[(1, 21677215), (5, 4335443), (7, 3096745), (31, 699265), (35, 619349), (155, 139853), (217, 99895), (1085, 19979)]