19910420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{24281}}^1$

素因数の和:24331

約数の個数: 24

約数和(自身を含む): 42833448

約数和(自身を除く): 22923028

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 24281, 48562, 97124, 121405, 242810, 485620, 995521, 1991042, 3982084, 4977605, 9955210, 19910420]

約数ペア:

[(1, 19910420), (2, 9955210), (4, 4977605), (5, 3982084), (10, 1991042), (20, 995521), (41, 485620), (82, 242810), (164, 121405), (205, 97124), (410, 48562), (820, 24281)]