21978783

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{8753}}^1$

素因数の和:8796

約数の個数: 20

約数和(自身を含む): 33895488

約数和(自身を除く): 11916705

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 8753, 26259, 78777, 236331, 271343, 708993, 814029, 2442087, 7326261, 21978783]

約数ペア:

[(1, 21978783), (3, 7326261), (9, 2442087), (27, 814029), (31, 708993), (81, 271343), (93, 236331), (279, 78777), (837, 26259), (2511, 8753)]