21553551

素因数分解:

$3^2\times {\mathrm{109}}^1\times {\mathrm{127}}^1\times {\mathrm{173}}^1$

素因数の和:415

約数の個数: 24

約数和(自身を含む): 31848960

約数和(自身を除く): 10295409

約数列:

[1, 3, 9, 109, 127, 173, 327, 381, 519, 981, 1143, 1557, 13843, 18857, 21971, 41529, 56571, 65913, 124587, 169713, 197739, 2394839, 7184517, 21553551]

約数ペア:

[(1, 21553551), (3, 7184517), (9, 2394839), (109, 197739), (127, 169713), (173, 124587), (327, 65913), (381, 56571), (519, 41529), (981, 21971), (1143, 18857), (1557, 13843)]