15720155

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:116

約数の個数: 48

約数和(自身を含む): 23341824

約数和(自身を除く): 7621669

約数列:

[1, 5, 11, 17, 23, 43, 55, 85, 115, 187, 215, 253, 289, 391, 473, 731, 935, 989, 1265, 1445, 1955, 2365, 3179, 3655, 4301, 4945, 6647, 8041, 10879, 12427, 15895, 16813, 21505, 33235, 40205, 54395, 62135, 73117, 84065, 136697, 184943, 285821, 365585, 683485, 924715, 1429105, 3144031, 15720155]

約数ペア:

[(1, 15720155), (5, 3144031), (11, 1429105), (17, 924715), (23, 683485), (43, 365585), (55, 285821), (85, 184943), (115, 136697), (187, 84065), (215, 73117), (253, 62135), (289, 54395), (391, 40205), (473, 33235), (731, 21505), (935, 16813), (989, 15895), (1265, 12427), (1445, 10879), (1955, 8041), (2365, 6647), (3179, 4945), (3655, 4301)]