28728909

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1$

素因数の和:119

約数の個数: 72

約数和(自身を含む): 50459136

約数和(自身を除く): 21730227

約数列:

[1, 3, 9, 11, 23, 31, 33, 37, 69, 93, 99, 111, 121, 207, 253, 279, 333, 341, 363, 407, 713, 759, 851, 1023, 1089, 1147, 1221, 2139, 2277, 2553, 2783, 3069, 3441, 3663, 3751, 4477, 6417, 7659, 7843, 8349, 9361, 10323, 11253, 12617, 13431, 23529, 25047, 26381, 28083, 33759, 37851, 40293, 70587, 79143, 84249, 86273, 102971, 113553, 138787, 237429, 258819, 290191, 308913, 416361, 776457, 870573, 926739, 1249083, 2611719, 3192101, 9576303, 28728909]

約数ペア:

[(1, 28728909), (3, 9576303), (9, 3192101), (11, 2611719), (23, 1249083), (31, 926739), (33, 870573), (37, 776457), (69, 416361), (93, 308913), (99, 290191), (111, 258819), (121, 237429), (207, 138787), (253, 113553), (279, 102971), (333, 86273), (341, 84249), (363, 79143), (407, 70587), (713, 40293), (759, 37851), (851, 33759), (1023, 28083), (1089, 26381), (1147, 25047), (1221, 23529), (2139, 13431), (2277, 12617), (2553, 11253), (2783, 10323), (3069, 9361), (3441, 8349), (3663, 7843), (3751, 7659), (4477, 6417)]