18430251

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{263}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 29196288

約数和(自身を除く): 10766037

約数列:

[1, 3, 7, 21, 47, 71, 141, 213, 263, 329, 497, 789, 987, 1491, 1841, 3337, 5523, 10011, 12361, 18673, 23359, 37083, 56019, 70077, 86527, 130711, 259581, 392133, 877631, 2632893, 6143417, 18430251]

約数ペア:

[(1, 18430251), (3, 6143417), (7, 2632893), (21, 877631), (47, 392133), (71, 259581), (141, 130711), (213, 86527), (263, 70077), (329, 56019), (497, 37083), (789, 23359), (987, 18673), (1491, 12361), (1841, 10011), (3337, 5523)]