21260115

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{27791}}^1$

素因数の和:27819

約数の個数: 24

約数和(自身を含む): 39019968

約数和(自身を除く): 17759853

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 27791, 83373, 138955, 250119, 416865, 472447, 1250595, 1417341, 2362235, 4252023, 7086705, 21260115]

約数ペア:

[(1, 21260115), (3, 7086705), (5, 4252023), (9, 2362235), (15, 1417341), (17, 1250595), (45, 472447), (51, 416865), (85, 250119), (153, 138955), (255, 83373), (765, 27791)]