21388857

素因数分解:

$3^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{283}}^1$

素因数の和:413

約数の個数: 32

約数和(自身を含む): 33807360

約数和(自身を除く): 12418503

約数列:

[1, 3, 7, 21, 59, 61, 177, 183, 283, 413, 427, 849, 1239, 1281, 1981, 3599, 5943, 10797, 16697, 17263, 25193, 50091, 51789, 75579, 116879, 120841, 350637, 362523, 1018517, 3055551, 7129619, 21388857]

約数ペア:

[(1, 21388857), (3, 7129619), (7, 3055551), (21, 1018517), (59, 362523), (61, 350637), (177, 120841), (183, 116879), (283, 75579), (413, 51789), (427, 50091), (849, 25193), (1239, 17263), (1281, 16697), (1981, 10797), (3599, 5943)]