20953870

素因数分解:

$2^1\times 5^1\times 7^3\times {\mathrm{41}}^1\times {\mathrm{149}}^1$

素因数の和:218

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 24406130

約数列:

[1, 2, 5, 7, 10, 14, 35, 41, 49, 70, 82, 98, 149, 205, 245, 287, 298, 343, 410, 490, 574, 686, 745, 1043, 1435, 1490, 1715, 2009, 2086, 2870, 3430, 4018, 5215, 6109, 7301, 10045, 10430, 12218, 14063, 14602, 20090, 28126, 30545, 36505, 42763, 51107, 61090, 70315, 73010, 85526, 102214, 140630, 213815, 255535, 299341, 427630, 511070, 598682, 1496705, 2095387, 2993410, 4190774, 10476935, 20953870]

約数ペア:

[(1, 20953870), (2, 10476935), (5, 4190774), (7, 2993410), (10, 2095387), (14, 1496705), (35, 598682), (41, 511070), (49, 427630), (70, 299341), (82, 255535), (98, 213815), (149, 140630), (205, 102214), (245, 85526), (287, 73010), (298, 70315), (343, 61090), (410, 51107), (490, 42763), (574, 36505), (686, 30545), (745, 28126), (1043, 20090), (1435, 14602), (1490, 14063), (1715, 12218), (2009, 10430), (2086, 10045), (2870, 7301), (3430, 6109), (4018, 5215)]