78824140

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{991}}^1$

素因数の和:1138

約数の個数: 48

約数和(自身を含む): 171489024

約数和(自身を除く): 92664884

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 97, 164, 194, 205, 388, 410, 485, 820, 970, 991, 1940, 1982, 3964, 3977, 4955, 7954, 9910, 15908, 19820, 19885, 39770, 40631, 79540, 81262, 96127, 162524, 192254, 203155, 384508, 406310, 480635, 812620, 961270, 1922540, 3941207, 7882414, 15764828, 19706035, 39412070, 78824140]

約数ペア:

[(1, 78824140), (2, 39412070), (4, 19706035), (5, 15764828), (10, 7882414), (20, 3941207), (41, 1922540), (82, 961270), (97, 812620), (164, 480635), (194, 406310), (205, 384508), (388, 203155), (410, 192254), (485, 162524), (820, 96127), (970, 81262), (991, 79540), (1940, 40631), (1982, 39770), (3964, 19885), (3977, 19820), (4955, 15908), (7954, 9910)]