19771765

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{617}}^1$

素因数の和:681

約数の個数: 32

約数和(自身を含む): 28032480

約数和(自身を除く): 8260715

約数列:

[1, 5, 13, 17, 29, 65, 85, 145, 221, 377, 493, 617, 1105, 1885, 2465, 3085, 6409, 8021, 10489, 17893, 32045, 40105, 52445, 89465, 136357, 232609, 304181, 681785, 1163045, 1520905, 3954353, 19771765]

約数ペア:

[(1, 19771765), (5, 3954353), (13, 1520905), (17, 1163045), (29, 681785), (65, 304181), (85, 232609), (145, 136357), (221, 89465), (377, 52445), (493, 40105), (617, 32045), (1105, 17893), (1885, 10489), (2465, 8021), (3085, 6409)]