19902715

素因数分解:

$5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{4091}}^1$

素因数の和:4242

約数の個数: 16

約数和(自身を含む): 27498240

約数和(自身を除く): 7595525

約数列:

[1, 5, 7, 35, 139, 695, 973, 4091, 4865, 20455, 28637, 143185, 568649, 2843245, 3980543, 19902715]

約数ペア:

[(1, 19902715), (5, 3980543), (7, 2843245), (35, 568649), (139, 143185), (695, 28637), (973, 20455), (4091, 4865)]