21890890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{312727}}^1$

素因数の和:312741

約数の個数: 16

約数和(自身を含む): 45032832

約数和(自身を除く): 23141942

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 312727, 625454, 1563635, 2189089, 3127270, 4378178, 10945445, 21890890]

約数ペア:

[(1, 21890890), (2, 10945445), (5, 4378178), (7, 3127270), (10, 2189089), (14, 1563635), (35, 625454), (70, 312727)]