19900535

素因数分解:

$5^1\times {\mathrm{101}}^1\times {\mathrm{157}}^1\times {\mathrm{251}}^1$

素因数の和:514

約数の個数: 16

約数和(自身を含む): 24367392

約数和(自身を除く): 4466857

約数列:

[1, 5, 101, 157, 251, 505, 785, 1255, 15857, 25351, 39407, 79285, 126755, 197035, 3980107, 19900535]

約数ペア:

[(1, 19900535), (5, 3980107), (101, 197035), (157, 126755), (251, 79285), (505, 39407), (785, 25351), (1255, 15857)]