19819891

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{353}}^1\times {\mathrm{617}}^1$

素因数の和:990

約数の個数: 16

約数和(自身を含む): 24502464

約数和(自身を除く): 4682573

約数列:

[1, 7, 13, 91, 353, 617, 2471, 4319, 4589, 8021, 32123, 56147, 217801, 1524607, 2831413, 19819891]

約数ペア:

[(1, 19819891), (7, 2831413), (13, 1524607), (91, 217801), (353, 56147), (617, 32123), (2471, 8021), (4319, 4589)]