21169715

素因数分解:

$5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1217}}^1$

素因数の和:1307

約数の個数: 24

約数和(自身を含む): 29992032

約数和(自身を除く): 8822317

約数列:

[1, 5, 7, 35, 49, 71, 245, 355, 497, 1217, 2485, 3479, 6085, 8519, 17395, 42595, 59633, 86407, 298165, 432035, 604849, 3024245, 4233943, 21169715]

約数ペア:

[(1, 21169715), (5, 4233943), (7, 3024245), (35, 604849), (49, 432035), (71, 298165), (245, 86407), (355, 59633), (497, 42595), (1217, 17395), (2485, 8519), (3479, 6085)]