21291423

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{127}}^1$

素因数の和:247

約数の個数: 32

約数和(自身を含む): 30965760

約数和(自身を除く): 9674337

約数列:

[1, 3, 29, 41, 47, 87, 123, 127, 141, 381, 1189, 1363, 1927, 3567, 3683, 4089, 5207, 5781, 5969, 11049, 15621, 17907, 55883, 151003, 167649, 173101, 244729, 453009, 519303, 734187, 7097141, 21291423]

約数ペア:

[(1, 21291423), (3, 7097141), (29, 734187), (41, 519303), (47, 453009), (87, 244729), (123, 173101), (127, 167649), (141, 151003), (381, 55883), (1189, 17907), (1363, 15621), (1927, 11049), (3567, 5969), (3683, 5781), (4089, 5207)]