19937440

素因数分解:

$2^5\times 5^1\times {\mathrm{353}}^2$

素因数の和:721

約数の個数: 36

約数和(自身を含む): 47236014

約数和(自身を除く): 27298574

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 353, 706, 1412, 1765, 2824, 3530, 5648, 7060, 11296, 14120, 28240, 56480, 124609, 249218, 498436, 623045, 996872, 1246090, 1993744, 2492180, 3987488, 4984360, 9968720, 19937440]

約数ペア:

[(1, 19937440), (2, 9968720), (4, 4984360), (5, 3987488), (8, 2492180), (10, 1993744), (16, 1246090), (20, 996872), (32, 623045), (40, 498436), (80, 249218), (160, 124609), (353, 56480), (706, 28240), (1412, 14120), (1765, 11296), (2824, 7060), (3530, 5648)]