21025575

素因数分解:

$3^5\times 5^2\times {\mathrm{3461}}^1$

素因数の和:3486

約数の個数: 36

約数和(自身を含む): 39065208

約数和(自身を除く): 18039633

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 135, 225, 243, 405, 675, 1215, 2025, 3461, 6075, 10383, 17305, 31149, 51915, 86525, 93447, 155745, 259575, 280341, 467235, 778725, 841023, 1401705, 2336175, 4205115, 7008525, 21025575]

約数ペア:

[(1, 21025575), (3, 7008525), (5, 4205115), (9, 2336175), (15, 1401705), (25, 841023), (27, 778725), (45, 467235), (75, 280341), (81, 259575), (135, 155745), (225, 93447), (243, 86525), (405, 51915), (675, 31149), (1215, 17305), (2025, 10383), (3461, 6075)]