19310225

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:158

約数の個数: 48

約数和(自身を含む): 28283904

約数和(自身を除く): 8973679

約数列:

[1, 5, 11, 23, 25, 43, 55, 71, 115, 215, 253, 275, 355, 473, 575, 781, 989, 1075, 1265, 1633, 1775, 2365, 3053, 3905, 4945, 6325, 8165, 10879, 11825, 15265, 17963, 19525, 24725, 33583, 40825, 54395, 70219, 76325, 89815, 167915, 271975, 351095, 449075, 772409, 839575, 1755475, 3862045, 19310225]

約数ペア:

[(1, 19310225), (5, 3862045), (11, 1755475), (23, 839575), (25, 772409), (43, 449075), (55, 351095), (71, 271975), (115, 167915), (215, 89815), (253, 76325), (275, 70219), (355, 54395), (473, 40825), (575, 33583), (781, 24725), (989, 19525), (1075, 17963), (1265, 15265), (1633, 11825), (1775, 10879), (2365, 8165), (3053, 6325), (3905, 4945)]