21481455

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{1381}}^1$

素因数の和:1467

約数の個数: 32

約数和(自身を含む): 37015488

約数和(自身を除く): 15534033

約数列:

[1, 3, 5, 15, 17, 51, 61, 85, 183, 255, 305, 915, 1037, 1381, 3111, 4143, 5185, 6905, 15555, 20715, 23477, 70431, 84241, 117385, 252723, 352155, 421205, 1263615, 1432097, 4296291, 7160485, 21481455]

約数ペア:

[(1, 21481455), (3, 7160485), (5, 4296291), (15, 1432097), (17, 1263615), (51, 421205), (61, 352155), (85, 252723), (183, 117385), (255, 84241), (305, 70431), (915, 23477), (1037, 20715), (1381, 15555), (3111, 6905), (4143, 5185)]