21389628

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{4423}}^1$

素因数の和:4474

約数の個数: 48

約数和(自身を含む): 55494656

約数和(自身を除く): 34105028

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 31, 39, 52, 62, 78, 93, 124, 156, 186, 372, 403, 806, 1209, 1612, 2418, 4423, 4836, 8846, 13269, 17692, 26538, 53076, 57499, 114998, 137113, 172497, 229996, 274226, 344994, 411339, 548452, 689988, 822678, 1645356, 1782469, 3564938, 5347407, 7129876, 10694814, 21389628]

約数ペア:

[(1, 21389628), (2, 10694814), (3, 7129876), (4, 5347407), (6, 3564938), (12, 1782469), (13, 1645356), (26, 822678), (31, 689988), (39, 548452), (52, 411339), (62, 344994), (78, 274226), (93, 229996), (124, 172497), (156, 137113), (186, 114998), (372, 57499), (403, 53076), (806, 26538), (1209, 17692), (1612, 13269), (2418, 8846), (4423, 4836)]