21156255

素因数分解:

$3^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{2339}}^1$

素因数の和:2420

約数の個数: 32

約数和(自身を含む): 38188800

約数和(自身を除く): 17032545

約数列:

[1, 3, 5, 9, 15, 27, 45, 67, 135, 201, 335, 603, 1005, 1809, 2339, 3015, 7017, 9045, 11695, 21051, 35085, 63153, 105255, 156713, 315765, 470139, 783565, 1410417, 2350695, 4231251, 7052085, 21156255]

約数ペア:

[(1, 21156255), (3, 7052085), (5, 4231251), (9, 2350695), (15, 1410417), (27, 783565), (45, 470139), (67, 315765), (135, 156713), (201, 105255), (335, 63153), (603, 35085), (1005, 21051), (1809, 11695), (2339, 9045), (3015, 7017)]