21820365

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1307}}^1$

素因数の和:1378

約数の個数: 48

約数和(自身を含む): 44074368

約数和(自身を除く): 22254003

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 53, 63, 105, 159, 265, 315, 371, 477, 795, 1113, 1307, 1855, 2385, 3339, 3921, 5565, 6535, 9149, 11763, 16695, 19605, 27447, 45745, 58815, 69271, 82341, 137235, 207813, 346355, 411705, 484897, 623439, 1039065, 1454691, 2424485, 3117195, 4364073, 7273455, 21820365]

約数ペア:

[(1, 21820365), (3, 7273455), (5, 4364073), (7, 3117195), (9, 2424485), (15, 1454691), (21, 1039065), (35, 623439), (45, 484897), (53, 411705), (63, 346355), (105, 207813), (159, 137235), (265, 82341), (315, 69271), (371, 58815), (477, 45745), (795, 27447), (1113, 19605), (1307, 16695), (1855, 11763), (2385, 9149), (3339, 6535), (3921, 5565)]