21200025

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{3671}}^1$

素因数の和:3702

約数の個数: 48

約数和(自身を含む): 43711488

約数和(自身を除く): 22511463

約数列:

[1, 3, 5, 7, 11, 15, 21, 25, 33, 35, 55, 75, 77, 105, 165, 175, 231, 275, 385, 525, 825, 1155, 1925, 3671, 5775, 11013, 18355, 25697, 40381, 55065, 77091, 91775, 121143, 128485, 201905, 275325, 282667, 385455, 605715, 642425, 848001, 1009525, 1413335, 1927275, 3028575, 4240005, 7066675, 21200025]

約数ペア:

[(1, 21200025), (3, 7066675), (5, 4240005), (7, 3028575), (11, 1927275), (15, 1413335), (21, 1009525), (25, 848001), (33, 642425), (35, 605715), (55, 385455), (75, 282667), (77, 275325), (105, 201905), (165, 128485), (175, 121143), (231, 91775), (275, 77091), (385, 55065), (525, 40381), (825, 25697), (1155, 18355), (1925, 11013), (3671, 5775)]