21928907

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1153}}^1$

素因数の和:1203

約数の個数: 32

約数和(自身を含む): 31019520

約数和(自身を除く): 9090613

約数列:

[1, 7, 11, 13, 19, 77, 91, 133, 143, 209, 247, 1001, 1153, 1463, 1729, 2717, 8071, 12683, 14989, 19019, 21907, 88781, 104923, 153349, 164879, 240977, 284791, 1154153, 1686839, 1993537, 3132701, 21928907]

約数ペア:

[(1, 21928907), (7, 3132701), (11, 1993537), (13, 1686839), (19, 1154153), (77, 284791), (91, 240977), (133, 164879), (143, 153349), (209, 104923), (247, 88781), (1001, 21907), (1153, 19019), (1463, 14989), (1729, 12683), (2717, 8071)]