19910220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{311}}^1$

素因数の和:431

約数の個数: 96

約数和(自身を含む): 61641216

約数和(自身を除く): 41730996

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 97, 110, 132, 165, 194, 220, 291, 311, 330, 388, 485, 582, 622, 660, 933, 970, 1067, 1164, 1244, 1455, 1555, 1866, 1940, 2134, 2910, 3110, 3201, 3421, 3732, 4268, 4665, 5335, 5820, 6220, 6402, 6842, 9330, 10263, 10670, 12804, 13684, 16005, 17105, 18660, 20526, 21340, 30167, 32010, 34210, 41052, 51315, 60334, 64020, 68420, 90501, 102630, 120668, 150835, 181002, 205260, 301670, 331837, 362004, 452505, 603340, 663674, 905010, 995511, 1327348, 1659185, 1810020, 1991022, 3318370, 3982044, 4977555, 6636740, 9955110, 19910220]

約数ペア:

[(1, 19910220), (2, 9955110), (3, 6636740), (4, 4977555), (5, 3982044), (6, 3318370), (10, 1991022), (11, 1810020), (12, 1659185), (15, 1327348), (20, 995511), (22, 905010), (30, 663674), (33, 603340), (44, 452505), (55, 362004), (60, 331837), (66, 301670), (97, 205260), (110, 181002), (132, 150835), (165, 120668), (194, 102630), (220, 90501), (291, 68420), (311, 64020), (330, 60334), (388, 51315), (485, 41052), (582, 34210), (622, 32010), (660, 30167), (933, 21340), (970, 20526), (1067, 18660), (1164, 17105), (1244, 16005), (1455, 13684), (1555, 12804), (1866, 10670), (1940, 10263), (2134, 9330), (2910, 6842), (3110, 6402), (3201, 6220), (3421, 5820), (3732, 5335), (4268, 4665)]