21095715

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1301}}^1$

素因数の和:1379

約数の個数: 32

約数和(自身を含む): 35997696

約数和(自身を除く): 14901981

約数列:

[1, 3, 5, 15, 23, 47, 69, 115, 141, 235, 345, 705, 1081, 1301, 3243, 3903, 5405, 6505, 16215, 19515, 29923, 61147, 89769, 149615, 183441, 305735, 448845, 917205, 1406381, 4219143, 7031905, 21095715]

約数ペア:

[(1, 21095715), (3, 7031905), (5, 4219143), (15, 1406381), (23, 917205), (47, 448845), (69, 305735), (115, 183441), (141, 149615), (235, 89769), (345, 61147), (705, 29923), (1081, 19515), (1301, 16215), (3243, 6505), (3903, 5405)]