21478569

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53831}}^1$

素因数の和:53860

約数の個数: 16

約数和(自身を含む): 34452480

約数和(自身を除く): 12973911

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53831, 161493, 376817, 1022789, 1130451, 3068367, 7159523, 21478569]

約数ペア:

[(1, 21478569), (3, 7159523), (7, 3068367), (19, 1130451), (21, 1022789), (57, 376817), (133, 161493), (399, 53831)]