20479815

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1409}}^1$

素因数の和:1456

約数の個数: 48

約数和(自身を含む): 39592800

約数和(自身を除く): 19112985

約数列:

[1, 3, 5, 9, 15, 17, 19, 45, 51, 57, 85, 95, 153, 171, 255, 285, 323, 765, 855, 969, 1409, 1615, 2907, 4227, 4845, 7045, 12681, 14535, 21135, 23953, 26771, 63405, 71859, 80313, 119765, 133855, 215577, 240939, 359295, 401565, 455107, 1077885, 1204695, 1365321, 2275535, 4095963, 6826605, 20479815]

約数ペア:

[(1, 20479815), (3, 6826605), (5, 4095963), (9, 2275535), (15, 1365321), (17, 1204695), (19, 1077885), (45, 455107), (51, 401565), (57, 359295), (85, 240939), (95, 215577), (153, 133855), (171, 119765), (255, 80313), (285, 71859), (323, 63405), (765, 26771), (855, 23953), (969, 21135), (1409, 14535), (1615, 12681), (2907, 7045), (4227, 4845)]