21081519

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{283}}^1$

素因数の和:412

約数の個数: 32

約数和(自身を含む): 32716800

約数和(自身を除く): 11635281

約数列:

[1, 3, 9, 27, 31, 89, 93, 267, 279, 283, 801, 837, 849, 2403, 2547, 2759, 7641, 8277, 8773, 24831, 25187, 26319, 74493, 75561, 78957, 226683, 236871, 680049, 780797, 2342391, 7027173, 21081519]

約数ペア:

[(1, 21081519), (3, 7027173), (9, 2342391), (27, 780797), (31, 680049), (89, 236871), (93, 226683), (267, 78957), (279, 75561), (283, 74493), (801, 26319), (837, 25187), (849, 24831), (2403, 8773), (2547, 8277), (2759, 7641)]