21457413

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{317}}^1$

素因数の和:458

約数の個数: 32

約数和(自身を含む): 33580800

約数和(自身を除く): 12123387

約数列:

[1, 3, 9, 23, 27, 69, 109, 207, 317, 327, 621, 951, 981, 2507, 2853, 2943, 7291, 7521, 8559, 21873, 22563, 34553, 65619, 67689, 103659, 196857, 310977, 794719, 932931, 2384157, 7152471, 21457413]

約数ペア:

[(1, 21457413), (3, 7152471), (9, 2384157), (23, 932931), (27, 794719), (69, 310977), (109, 196857), (207, 103659), (317, 67689), (327, 65619), (621, 34553), (951, 22563), (981, 21873), (2507, 8559), (2853, 7521), (2943, 7291)]