21697551

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{8641}}^1$

素因数の和:8684

約数の個数: 20

約数和(自身を含む): 33461824

約数和(自身を除く): 11764273

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 8641, 25923, 77769, 233307, 267871, 699921, 803613, 2410839, 7232517, 21697551]

約数ペア:

[(1, 21697551), (3, 7232517), (9, 2410839), (27, 803613), (31, 699921), (81, 267871), (93, 233307), (279, 77769), (837, 25923), (2511, 8641)]