19905380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{523}}^1$

素因数の和:716

約数の個数: 48

約数和(自身を含む): 45952704

約数和(自身を除く): 26047324

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 173, 220, 346, 523, 692, 865, 1046, 1730, 1903, 2092, 2615, 3460, 3806, 5230, 5753, 7612, 9515, 10460, 11506, 19030, 23012, 28765, 38060, 57530, 90479, 115060, 180958, 361916, 452395, 904790, 995269, 1809580, 1990538, 3981076, 4976345, 9952690, 19905380]

約数ペア:

[(1, 19905380), (2, 9952690), (4, 4976345), (5, 3981076), (10, 1990538), (11, 1809580), (20, 995269), (22, 904790), (44, 452395), (55, 361916), (110, 180958), (173, 115060), (220, 90479), (346, 57530), (523, 38060), (692, 28765), (865, 23012), (1046, 19030), (1730, 11506), (1903, 10460), (2092, 9515), (2615, 7612), (3460, 5753), (3806, 5230)]