19970405

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43891}}^1$

素因数の和:43916

約数の個数: 16

約数和(自身を含む): 29495424

約数和(自身を除く): 9525019

約数列:

[1, 5, 7, 13, 35, 65, 91, 455, 43891, 219455, 307237, 570583, 1536185, 2852915, 3994081, 19970405]

約数ペア:

[(1, 19970405), (5, 3994081), (7, 2852915), (13, 1536185), (35, 570583), (65, 307237), (91, 219455), (455, 43891)]