21228597

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{821}}^1$

素因数の和:870

約数の個数: 36

約数和(自身を含む): 35199684

約数和(自身を除く): 13971087

約数列:

[1, 3, 9, 13, 17, 39, 51, 117, 153, 169, 221, 507, 663, 821, 1521, 1989, 2463, 2873, 7389, 8619, 10673, 13957, 25857, 32019, 41871, 96057, 125613, 138749, 181441, 416247, 544323, 1248741, 1632969, 2358733, 7076199, 21228597]

約数ペア:

[(1, 21228597), (3, 7076199), (9, 2358733), (13, 1632969), (17, 1248741), (39, 544323), (51, 416247), (117, 181441), (153, 138749), (169, 125613), (221, 96057), (507, 41871), (663, 32019), (821, 25857), (1521, 13957), (1989, 10673), (2463, 8619), (2873, 7389)]