21491356

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{3407}}^1$

素因数の和:3513

約数の個数: 24

約数和(自身を含む): 40078080

約数和(自身を除く): 18586724

約数列:

[1, 2, 4, 19, 38, 76, 83, 166, 332, 1577, 3154, 3407, 6308, 6814, 13628, 64733, 129466, 258932, 282781, 565562, 1131124, 5372839, 10745678, 21491356]

約数ペア:

[(1, 21491356), (2, 10745678), (4, 5372839), (19, 1131124), (38, 565562), (76, 282781), (83, 258932), (166, 129466), (332, 64733), (1577, 13628), (3154, 6814), (3407, 6308)]