21953205

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{28697}}^1$

素因数の和:28725

約数の個数: 24

約数和(自身を含む): 40291992

約数和(自身を除く): 18338787

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 28697, 86091, 143485, 258273, 430455, 487849, 1291365, 1463547, 2439245, 4390641, 7317735, 21953205]

約数ペア:

[(1, 21953205), (3, 7317735), (5, 4390641), (9, 2439245), (15, 1463547), (17, 1291365), (45, 487849), (51, 430455), (85, 258273), (153, 143485), (255, 86091), (765, 28697)]