21391450

素因数分解:

$2^1\times 5^2\times {\mathrm{173}}^1\times {\mathrm{2473}}^1$

素因数の和:2658

約数の個数: 24

約数和(自身を含む): 40034268

約数和(自身を除く): 18642818

約数列:

[1, 2, 5, 10, 25, 50, 173, 346, 865, 1730, 2473, 4325, 4946, 8650, 12365, 24730, 61825, 123650, 427829, 855658, 2139145, 4278290, 10695725, 21391450]

約数ペア:

[(1, 21391450), (2, 10695725), (5, 4278290), (10, 2139145), (25, 855658), (50, 427829), (173, 123650), (346, 61825), (865, 24730), (1730, 12365), (2473, 8650), (4325, 4946)]