21380868

素因数分解:

$2^2\times 3^3\times {\mathrm{197971}}^1$

素因数の和:197984

約数の個数: 24

約数和(自身を含む): 55432160

約数和(自身を除く): 34051292

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108, 197971, 395942, 593913, 791884, 1187826, 1781739, 2375652, 3563478, 5345217, 7126956, 10690434, 21380868]

約数ペア:

[(1, 21380868), (2, 10690434), (3, 7126956), (4, 5345217), (6, 3563478), (9, 2375652), (12, 1781739), (18, 1187826), (27, 791884), (36, 593913), (54, 395942), (108, 197971)]