21308315

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{479}}^1$

素因数の和:563

約数の個数: 32

約数和(自身を含む): 30965760

約数和(自身を除く): 9657445

約数列:

[1, 5, 7, 31, 35, 41, 155, 205, 217, 287, 479, 1085, 1271, 1435, 2395, 3353, 6355, 8897, 14849, 16765, 19639, 44485, 74245, 98195, 103943, 137473, 519715, 608809, 687365, 3044045, 4261663, 21308315]

約数ペア:

[(1, 21308315), (5, 4261663), (7, 3044045), (31, 687365), (35, 608809), (41, 519715), (155, 137473), (205, 103943), (217, 98195), (287, 74245), (479, 44485), (1085, 19639), (1271, 16765), (1435, 14849), (2395, 8897), (3353, 6355)]