21984813

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{643}}^1$

素因数の和:809

約数の個数: 24

約数和(自身を含む): 33153120

約数和(自身を除く): 11168307

約数列:

[1, 3, 9, 29, 87, 131, 261, 393, 643, 1179, 1929, 3799, 5787, 11397, 18647, 34191, 55941, 84233, 167823, 252699, 758097, 2442757, 7328271, 21984813]

約数ペア:

[(1, 21984813), (3, 7328271), (9, 2442757), (29, 758097), (87, 252699), (131, 167823), (261, 84233), (393, 55941), (643, 34191), (1179, 18647), (1929, 11397), (3799, 5787)]