20809215

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2131}}^1$

素因数の和:2180

約数の個数: 48

約数和(自身を含む): 42571776

約数和(自身を除く): 21762561

約数列:

[1, 3, 5, 7, 9, 15, 21, 31, 35, 45, 63, 93, 105, 155, 217, 279, 315, 465, 651, 1085, 1395, 1953, 2131, 3255, 6393, 9765, 10655, 14917, 19179, 31965, 44751, 66061, 74585, 95895, 134253, 198183, 223755, 330305, 462427, 594549, 671265, 990915, 1387281, 2312135, 2972745, 4161843, 6936405, 20809215]

約数ペア:

[(1, 20809215), (3, 6936405), (5, 4161843), (7, 2972745), (9, 2312135), (15, 1387281), (21, 990915), (31, 671265), (35, 594549), (45, 462427), (63, 330305), (93, 223755), (105, 198183), (155, 134253), (217, 95895), (279, 74585), (315, 66061), (465, 44751), (651, 31965), (1085, 19179), (1395, 14917), (1953, 10655), (2131, 9765), (3255, 6393)]