21259197

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{3389}}^1$

素因数の和:3453

約数の個数: 24

約数和(自身を含む): 33316920

約数和(自身を除く): 12057723

約数列:

[1, 3, 9, 17, 41, 51, 123, 153, 369, 697, 2091, 3389, 6273, 10167, 30501, 57613, 138949, 172839, 416847, 518517, 1250541, 2362133, 7086399, 21259197]

約数ペア:

[(1, 21259197), (3, 7086399), (9, 2362133), (17, 1250541), (41, 518517), (51, 416847), (123, 172839), (153, 138949), (369, 57613), (697, 30501), (2091, 10167), (3389, 6273)]