19929400

素因数分解:

$2^3\times 5^2\times {\mathrm{251}}^1\times {\mathrm{397}}^1$

素因数の和:664

約数の個数: 48

約数和(自身を含む): 46637640

約数和(自身を除く): 26708240

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 251, 397, 502, 794, 1004, 1255, 1588, 1985, 2008, 2510, 3176, 3970, 5020, 6275, 7940, 9925, 10040, 12550, 15880, 19850, 25100, 39700, 50200, 79400, 99647, 199294, 398588, 498235, 797176, 996470, 1992940, 2491175, 3985880, 4982350, 9964700, 19929400]

約数ペア:

[(1, 19929400), (2, 9964700), (4, 4982350), (5, 3985880), (8, 2491175), (10, 1992940), (20, 996470), (25, 797176), (40, 498235), (50, 398588), (100, 199294), (200, 99647), (251, 79400), (397, 50200), (502, 39700), (794, 25100), (1004, 19850), (1255, 15880), (1588, 12550), (1985, 10040), (2008, 9925), (2510, 7940), (3176, 6275), (3970, 5020)]