20781005

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{179}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 29859840

約数和(自身を除く): 9078835

約数列:

[1, 5, 7, 31, 35, 107, 155, 179, 217, 535, 749, 895, 1085, 1253, 3317, 3745, 5549, 6265, 16585, 19153, 23219, 27745, 38843, 95765, 116095, 134071, 194215, 593743, 670355, 2968715, 4156201, 20781005]

約数ペア:

[(1, 20781005), (5, 4156201), (7, 2968715), (31, 670355), (35, 593743), (107, 194215), (155, 134071), (179, 116095), (217, 95765), (535, 38843), (749, 27745), (895, 23219), (1085, 19153), (1253, 16585), (3317, 6265), (3745, 5549)]