21156075

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{5531}}^1$

素因数の和:5564

約数の個数: 36

約数和(自身を含む): 40129128

約数和(自身を除く): 18973053

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 85, 153, 225, 255, 425, 765, 1275, 3825, 5531, 16593, 27655, 49779, 82965, 94027, 138275, 248895, 282081, 414825, 470135, 846243, 1244475, 1410405, 2350675, 4231215, 7052025, 21156075]

約数ペア:

[(1, 21156075), (3, 7052025), (5, 4231215), (9, 2350675), (15, 1410405), (17, 1244475), (25, 846243), (45, 470135), (51, 414825), (75, 282081), (85, 248895), (153, 138275), (225, 94027), (255, 82965), (425, 49779), (765, 27655), (1275, 16593), (3825, 5531)]