21715870

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{131}}^1\times {\mathrm{137}}^1$

素因数の和:297

約数の個数: 48

約数和(自身を含む): 43609104

約数和(自身を除く): 21893234

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 121, 131, 137, 242, 262, 274, 605, 655, 685, 1210, 1310, 1370, 1441, 1507, 2882, 3014, 7205, 7535, 14410, 15070, 15851, 16577, 17947, 31702, 33154, 35894, 79255, 82885, 89735, 158510, 165770, 179470, 197417, 394834, 987085, 1974170, 2171587, 4343174, 10857935, 21715870]

約数ペア:

[(1, 21715870), (2, 10857935), (5, 4343174), (10, 2171587), (11, 1974170), (22, 987085), (55, 394834), (110, 197417), (121, 179470), (131, 165770), (137, 158510), (242, 89735), (262, 82885), (274, 79255), (605, 35894), (655, 33154), (685, 31702), (1210, 17947), (1310, 16577), (1370, 15851), (1441, 15070), (1507, 14410), (2882, 7535), (3014, 7205)]