20687199

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{241}}^1$

素因数の和:359

約数の個数: 32

約数和(自身を含む): 31223808

約数和(自身を除く): 10536609

約数列:

[1, 3, 13, 31, 39, 71, 93, 213, 241, 403, 723, 923, 1209, 2201, 2769, 3133, 6603, 7471, 9399, 17111, 22413, 28613, 51333, 85839, 97123, 222443, 291369, 530441, 667329, 1591323, 6895733, 20687199]

約数ペア:

[(1, 20687199), (3, 6895733), (13, 1591323), (31, 667329), (39, 530441), (71, 291369), (93, 222443), (213, 97123), (241, 85839), (403, 51333), (723, 28613), (923, 22413), (1209, 17111), (2201, 9399), (2769, 7471), (3133, 6603)]