21251223

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4751}}^1$

素因数の和:4835

約数の個数: 24

約数和(自身を含む): 35582976

約数和(自身を除く): 14331753

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 4751, 14253, 33257, 42759, 99771, 299313, 337321, 1011963, 2361247, 3035889, 7083741, 21251223]

約数ペア:

[(1, 21251223), (3, 7083741), (7, 3035889), (9, 2361247), (21, 1011963), (63, 337321), (71, 299313), (213, 99771), (497, 42759), (639, 33257), (1491, 14253), (4473, 4751)]