21186272

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{173}}^1$

素因数の和:315

約数の個数: 48

約数和(自身を含む): 43409520

約数和(自身を除く): 22223248

約数列:

[1, 2, 4, 8, 16, 32, 43, 86, 89, 172, 173, 178, 344, 346, 356, 688, 692, 712, 1376, 1384, 1424, 2768, 2848, 3827, 5536, 7439, 7654, 14878, 15308, 15397, 29756, 30616, 30794, 59512, 61232, 61588, 119024, 122464, 123176, 238048, 246352, 492704, 662071, 1324142, 2648284, 5296568, 10593136, 21186272]

約数ペア:

[(1, 21186272), (2, 10593136), (4, 5296568), (8, 2648284), (16, 1324142), (32, 662071), (43, 492704), (86, 246352), (89, 238048), (172, 123176), (173, 122464), (178, 119024), (344, 61588), (346, 61232), (356, 59512), (688, 30794), (692, 30616), (712, 29756), (1376, 15397), (1384, 15308), (1424, 14878), (2768, 7654), (2848, 7439), (3827, 5536)]