19972071

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5197}}^1$

素因数の和:5271

約数の個数: 24

約数和(自身を含む): 33516704

約数和(自身を除く): 13544633

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5197, 15591, 36379, 46773, 109137, 317017, 327411, 951051, 2219119, 2853153, 6657357, 19972071]

約数ペア:

[(1, 19972071), (3, 6657357), (7, 2853153), (9, 2219119), (21, 951051), (61, 327411), (63, 317017), (183, 109137), (427, 46773), (549, 36379), (1281, 15591), (3843, 5197)]