21661995

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{263}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 38903040

約数和(自身を除く): 17241045

約数列:

[1, 3, 5, 15, 17, 19, 51, 57, 85, 95, 255, 263, 285, 289, 323, 789, 867, 969, 1315, 1445, 1615, 3945, 4335, 4471, 4845, 4997, 5491, 13413, 14991, 16473, 22355, 24985, 27455, 67065, 74955, 76007, 82365, 84949, 228021, 254847, 380035, 424745, 1140105, 1274235, 1444133, 4332399, 7220665, 21661995]

約数ペア:

[(1, 21661995), (3, 7220665), (5, 4332399), (15, 1444133), (17, 1274235), (19, 1140105), (51, 424745), (57, 380035), (85, 254847), (95, 228021), (255, 84949), (263, 82365), (285, 76007), (289, 74955), (323, 67065), (789, 27455), (867, 24985), (969, 22355), (1315, 16473), (1445, 14991), (1615, 13413), (3945, 5491), (4335, 4997), (4471, 4845)]