21002013

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{1429}}^1$

素因数の和:1529

約数の個数: 24

約数和(自身を含む): 32123520

約数和(自身を除く): 11121507

約数列:

[1, 3, 9, 23, 69, 71, 207, 213, 639, 1429, 1633, 4287, 4899, 12861, 14697, 32867, 98601, 101459, 295803, 304377, 913131, 2333557, 7000671, 21002013]

約数ペア:

[(1, 21002013), (3, 7000671), (9, 2333557), (23, 913131), (69, 304377), (71, 295803), (207, 101459), (213, 98601), (639, 32867), (1429, 14697), (1633, 12861), (4287, 4899)]