81777880

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{863}}^1$

素因数の和:1000

約数の個数: 64

約数和(自身を含む): 194088960

約数和(自身を除く): 112311080

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 103, 115, 184, 206, 230, 412, 460, 515, 824, 863, 920, 1030, 1726, 2060, 2369, 3452, 4120, 4315, 4738, 6904, 8630, 9476, 11845, 17260, 18952, 19849, 23690, 34520, 39698, 47380, 79396, 88889, 94760, 99245, 158792, 177778, 198490, 355556, 396980, 444445, 711112, 793960, 888890, 1777780, 2044447, 3555560, 4088894, 8177788, 10222235, 16355576, 20444470, 40888940, 81777880]

約数ペア:

[(1, 81777880), (2, 40888940), (4, 20444470), (5, 16355576), (8, 10222235), (10, 8177788), (20, 4088894), (23, 3555560), (40, 2044447), (46, 1777780), (92, 888890), (103, 793960), (115, 711112), (184, 444445), (206, 396980), (230, 355556), (412, 198490), (460, 177778), (515, 158792), (824, 99245), (863, 94760), (920, 88889), (1030, 79396), (1726, 47380), (2060, 39698), (2369, 34520), (3452, 23690), (4120, 19849), (4315, 18952), (4738, 17260), (6904, 11845), (8630, 9476)]