21665919

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{229}}^1$

素因数の和:351

約数の個数: 32

約数和(自身を含む): 32855040

約数和(自身を除く): 11189121

約数列:

[1, 3, 11, 33, 47, 61, 141, 183, 229, 517, 671, 687, 1551, 2013, 2519, 2867, 7557, 8601, 10763, 13969, 31537, 32289, 41907, 94611, 118393, 153659, 355179, 460977, 656543, 1969629, 7221973, 21665919]

約数ペア:

[(1, 21665919), (3, 7221973), (11, 1969629), (33, 656543), (47, 460977), (61, 355179), (141, 153659), (183, 118393), (229, 94611), (517, 41907), (671, 32289), (687, 31537), (1551, 13969), (2013, 10763), (2519, 8601), (2867, 7557)]