21664195

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{487}}^1$

素因数の和:571

約数の個数: 32

約数和(自身を含む): 31481856

約数和(自身を除く): 9817661

約数列:

[1, 5, 7, 31, 35, 41, 155, 205, 217, 287, 487, 1085, 1271, 1435, 2435, 3409, 6355, 8897, 15097, 17045, 19967, 44485, 75485, 99835, 105679, 139769, 528395, 618977, 698845, 3094885, 4332839, 21664195]

約数ペア:

[(1, 21664195), (5, 4332839), (7, 3094885), (31, 698845), (35, 618977), (41, 528395), (155, 139769), (205, 105679), (217, 99835), (287, 75485), (487, 44485), (1085, 19967), (1271, 17045), (1435, 15097), (2435, 8897), (3409, 6355)]