21260025

素因数分解:

$3^2\times 5^2\times {\mathrm{61}}^1\times {\mathrm{1549}}^1$

素因数の和:1626

約数の個数: 36

約数和(自身を含む): 38728300

約数和(自身を除く): 17468275

約数列:

[1, 3, 5, 9, 15, 25, 45, 61, 75, 183, 225, 305, 549, 915, 1525, 1549, 2745, 4575, 4647, 7745, 13725, 13941, 23235, 38725, 69705, 94489, 116175, 283467, 348525, 472445, 850401, 1417335, 2362225, 4252005, 7086675, 21260025]

約数ペア:

[(1, 21260025), (3, 7086675), (5, 4252005), (9, 2362225), (15, 1417335), (25, 850401), (45, 472445), (61, 348525), (75, 283467), (183, 116175), (225, 94489), (305, 69705), (549, 38725), (915, 23235), (1525, 13941), (1549, 13725), (2745, 7745), (4575, 4647)]