21277455

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{461}}^1$

素因数の和:667

約数の個数: 32

約数和(自身を含む): 36324288

約数和(自身を除く): 15046833

約数列:

[1, 3, 5, 15, 17, 51, 85, 181, 255, 461, 543, 905, 1383, 2305, 2715, 3077, 6915, 7837, 9231, 15385, 23511, 39185, 46155, 83441, 117555, 250323, 417205, 1251615, 1418497, 4255491, 7092485, 21277455]

約数ペア:

[(1, 21277455), (3, 7092485), (5, 4255491), (15, 1418497), (17, 1251615), (51, 417205), (85, 250323), (181, 117555), (255, 83441), (461, 46155), (543, 39185), (905, 23511), (1383, 15385), (2305, 9231), (2715, 7837), (3077, 6915)]