19903023

素因数分解:

$3^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:169

約数の個数: 64

約数和(自身を含む): 36044800

約数和(自身を除く): 16141777

約数列:

[1, 3, 7, 9, 21, 27, 31, 43, 63, 79, 93, 129, 189, 217, 237, 279, 301, 387, 553, 651, 711, 837, 903, 1161, 1333, 1659, 1953, 2133, 2449, 2709, 3397, 3999, 4977, 5859, 7347, 8127, 9331, 10191, 11997, 14931, 17143, 22041, 23779, 27993, 30573, 35991, 51429, 66123, 71337, 83979, 91719, 105307, 154287, 214011, 251937, 315921, 462861, 642033, 737149, 947763, 2211447, 2843289, 6634341, 19903023]

約数ペア:

[(1, 19903023), (3, 6634341), (7, 2843289), (9, 2211447), (21, 947763), (27, 737149), (31, 642033), (43, 462861), (63, 315921), (79, 251937), (93, 214011), (129, 154287), (189, 105307), (217, 91719), (237, 83979), (279, 71337), (301, 66123), (387, 51429), (553, 35991), (651, 30573), (711, 27993), (837, 23779), (903, 22041), (1161, 17143), (1333, 14931), (1659, 11997), (1953, 10191), (2133, 9331), (2449, 8127), (2709, 7347), (3397, 5859), (3999, 4977)]