21356580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{50849}}^1$

素因数の和:50868

約数の個数: 48

約数和(自身を含む): 68342400

約数和(自身を除く): 46985820

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 50849, 101698, 152547, 203396, 254245, 305094, 355943, 508490, 610188, 711886, 762735, 1016980, 1067829, 1423772, 1525470, 1779715, 2135658, 3050940, 3559430, 4271316, 5339145, 7118860, 10678290, 21356580]

約数ペア:

[(1, 21356580), (2, 10678290), (3, 7118860), (4, 5339145), (5, 4271316), (6, 3559430), (7, 3050940), (10, 2135658), (12, 1779715), (14, 1525470), (15, 1423772), (20, 1067829), (21, 1016980), (28, 762735), (30, 711886), (35, 610188), (42, 508490), (60, 355943), (70, 305094), (84, 254245), (105, 203396), (140, 152547), (210, 101698), (420, 50849)]