21351771

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{7211}}^1$

素因数の和:7271

約数の個数: 24

約数和(自身を含む): 36002304

約数和(自身を除く): 14650533

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 7211, 21633, 50477, 64899, 151431, 338917, 454293, 1016751, 2372419, 3050253, 7117257, 21351771]

約数ペア:

[(1, 21351771), (3, 7117257), (7, 3050253), (9, 2372419), (21, 1016751), (47, 454293), (63, 338917), (141, 151431), (329, 64899), (423, 50477), (987, 21633), (2961, 7211)]