21856815

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{28571}}^1$

素因数の和:28599

約数の個数: 24

約数和(自身を含む): 40115088

約数和(自身を除く): 18258273

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 28571, 85713, 142855, 257139, 428565, 485707, 1285695, 1457121, 2428535, 4371363, 7285605, 21856815]

約数ペア:

[(1, 21856815), (3, 7285605), (5, 4371363), (9, 2428535), (15, 1457121), (17, 1285695), (45, 485707), (51, 428565), (85, 257139), (153, 142855), (255, 85713), (765, 28571)]