21153663

素因数分解:

$3^3\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:344

約数の個数: 32

約数和(自身を含む): 32598720

約数和(自身を除く): 11445057

約数列:

[1, 3, 9, 27, 41, 97, 123, 197, 291, 369, 591, 873, 1107, 1773, 2619, 3977, 5319, 8077, 11931, 19109, 24231, 35793, 57327, 72693, 107379, 171981, 218079, 515943, 783469, 2350407, 7051221, 21153663]

約数ペア:

[(1, 21153663), (3, 7051221), (9, 2350407), (27, 783469), (41, 515943), (97, 218079), (123, 171981), (197, 107379), (291, 72693), (369, 57327), (591, 35793), (873, 24231), (1107, 19109), (1773, 11931), (2619, 8077), (3977, 5319)]