20915865

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1439}}^1$

素因数の和:1486

約数の個数: 48

約数和(自身を含む): 40435200

約数和(自身を除く): 19519335

約数列:

[1, 3, 5, 9, 15, 17, 19, 45, 51, 57, 85, 95, 153, 171, 255, 285, 323, 765, 855, 969, 1439, 1615, 2907, 4317, 4845, 7195, 12951, 14535, 21585, 24463, 27341, 64755, 73389, 82023, 122315, 136705, 220167, 246069, 366945, 410115, 464797, 1100835, 1230345, 1394391, 2323985, 4183173, 6971955, 20915865]

約数ペア:

[(1, 20915865), (3, 6971955), (5, 4183173), (9, 2323985), (15, 1394391), (17, 1230345), (19, 1100835), (45, 464797), (51, 410115), (57, 366945), (85, 246069), (95, 220167), (153, 136705), (171, 122315), (255, 82023), (285, 73389), (323, 64755), (765, 27341), (855, 24463), (969, 21585), (1439, 14535), (1615, 12951), (2907, 7195), (4317, 4845)]