21231357

素因数分解:

$3^1\times 7^3\times {\mathrm{47}}^1\times {\mathrm{439}}^1$

素因数の和:510

約数の個数: 32

約数和(自身を含む): 33792000

約数和(自身を除く): 12560643

約数列:

[1, 3, 7, 21, 47, 49, 141, 147, 329, 343, 439, 987, 1029, 1317, 2303, 3073, 6909, 9219, 16121, 20633, 21511, 48363, 61899, 64533, 144431, 150577, 433293, 451731, 1011017, 3033051, 7077119, 21231357]

約数ペア:

[(1, 21231357), (3, 7077119), (7, 3033051), (21, 1011017), (47, 451731), (49, 433293), (141, 150577), (147, 144431), (329, 64533), (343, 61899), (439, 48363), (987, 21511), (1029, 20633), (1317, 16121), (2303, 9219), (3073, 6909)]