19910440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1223}}^1$

素因数の和:1282

約数の個数: 64

約数和(自身を含む): 50232960

約数和(自身を除く): 30322520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 110, 148, 185, 220, 296, 370, 407, 440, 740, 814, 1223, 1480, 1628, 2035, 2446, 3256, 4070, 4892, 6115, 8140, 9784, 12230, 13453, 16280, 24460, 26906, 45251, 48920, 53812, 67265, 90502, 107624, 134530, 181004, 226255, 269060, 362008, 452510, 497761, 538120, 905020, 995522, 1810040, 1991044, 2488805, 3982088, 4977610, 9955220, 19910440]

約数ペア:

[(1, 19910440), (2, 9955220), (4, 4977610), (5, 3982088), (8, 2488805), (10, 1991044), (11, 1810040), (20, 995522), (22, 905020), (37, 538120), (40, 497761), (44, 452510), (55, 362008), (74, 269060), (88, 226255), (110, 181004), (148, 134530), (185, 107624), (220, 90502), (296, 67265), (370, 53812), (407, 48920), (440, 45251), (740, 26906), (814, 24460), (1223, 16280), (1480, 13453), (1628, 12230), (2035, 9784), (2446, 8140), (3256, 6115), (4070, 4892)]