19901210

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{263}}^1$

素因数の和:347

約数の個数: 64

約数和(自身を含む): 43794432

約数和(自身を除く): 23893222

約数列:

[1, 2, 5, 7, 10, 14, 23, 35, 46, 47, 70, 94, 115, 161, 230, 235, 263, 322, 329, 470, 526, 658, 805, 1081, 1315, 1610, 1645, 1841, 2162, 2630, 3290, 3682, 5405, 6049, 7567, 9205, 10810, 12098, 12361, 15134, 18410, 24722, 30245, 37835, 42343, 60490, 61805, 75670, 84686, 86527, 123610, 173054, 211715, 284303, 423430, 432635, 568606, 865270, 1421515, 1990121, 2843030, 3980242, 9950605, 19901210]

約数ペア:

[(1, 19901210), (2, 9950605), (5, 3980242), (7, 2843030), (10, 1990121), (14, 1421515), (23, 865270), (35, 568606), (46, 432635), (47, 423430), (70, 284303), (94, 211715), (115, 173054), (161, 123610), (230, 86527), (235, 84686), (263, 75670), (322, 61805), (329, 60490), (470, 42343), (526, 37835), (658, 30245), (805, 24722), (1081, 18410), (1315, 15134), (1610, 12361), (1645, 12098), (1841, 10810), (2162, 9205), (2630, 7567), (3290, 6049), (3682, 5405)]