217761255

素因数分解:

$3^2\times 5^1\times {\mathrm{631}}^1\times {\mathrm{7669}}^1$

素因数の和:8311

約数の個数: 24

約数和(自身を含む): 378100320

約数和(自身を除く): 160339065

約数列:

[1, 3, 5, 9, 15, 45, 631, 1893, 3155, 5679, 7669, 9465, 23007, 28395, 38345, 69021, 115035, 345105, 4839139, 14517417, 24195695, 43552251, 72587085, 217761255]

約数ペア:

[(1, 217761255), (3, 72587085), (5, 43552251), (9, 24195695), (15, 14517417), (45, 4839139), (631, 345105), (1893, 115035), (3155, 69021), (5679, 38345), (7669, 28395), (9465, 23007)]