21705225

素因数分解:

$3^1\times 5^2\times {\mathrm{251}}^1\times {\mathrm{1153}}^1$

素因数の和:1417

約数の個数: 24

約数和(自身を含む): 36060192

約数和(自身を除く): 14354967

約数列:

[1, 3, 5, 15, 25, 75, 251, 753, 1153, 1255, 3459, 3765, 5765, 6275, 17295, 18825, 28825, 86475, 289403, 868209, 1447015, 4341045, 7235075, 21705225]

約数ペア:

[(1, 21705225), (3, 7235075), (5, 4341045), (15, 1447015), (25, 868209), (75, 289403), (251, 86475), (753, 28825), (1153, 18825), (1255, 17295), (3459, 6275), (3765, 5765)]