20389299

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{373}}^1$

素因数の和:539

約数の個数: 32

約数和(自身を含む): 33031680

約数和(自身を除く): 12642381

約数列:

[1, 3, 7, 19, 21, 57, 133, 137, 373, 399, 411, 959, 1119, 2603, 2611, 2877, 7087, 7809, 7833, 18221, 21261, 49609, 51101, 54663, 148827, 153303, 357707, 970919, 1073121, 2912757, 6796433, 20389299]

約数ペア:

[(1, 20389299), (3, 6796433), (7, 2912757), (19, 1073121), (21, 970919), (57, 357707), (133, 153303), (137, 148827), (373, 54663), (399, 51101), (411, 49609), (959, 21261), (1119, 18221), (2603, 7833), (2611, 7809), (2877, 7087)]