21537280

素因数分解:

$2^9\times 5^1\times {\mathrm{47}}^1\times {\mathrm{179}}^1$

素因数の和:249

約数の個数: 80

約数和(自身を含む): 53032320

約数和(自身を除く): 31495040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 47, 64, 80, 94, 128, 160, 179, 188, 235, 256, 320, 358, 376, 470, 512, 640, 716, 752, 895, 940, 1280, 1432, 1504, 1790, 1880, 2560, 2864, 3008, 3580, 3760, 5728, 6016, 7160, 7520, 8413, 11456, 12032, 14320, 15040, 16826, 22912, 24064, 28640, 30080, 33652, 42065, 45824, 57280, 60160, 67304, 84130, 91648, 114560, 120320, 134608, 168260, 229120, 269216, 336520, 458240, 538432, 673040, 1076864, 1346080, 2153728, 2692160, 4307456, 5384320, 10768640, 21537280]

約数ペア:

[(1, 21537280), (2, 10768640), (4, 5384320), (5, 4307456), (8, 2692160), (10, 2153728), (16, 1346080), (20, 1076864), (32, 673040), (40, 538432), (47, 458240), (64, 336520), (80, 269216), (94, 229120), (128, 168260), (160, 134608), (179, 120320), (188, 114560), (235, 91648), (256, 84130), (320, 67304), (358, 60160), (376, 57280), (470, 45824), (512, 42065), (640, 33652), (716, 30080), (752, 28640), (895, 24064), (940, 22912), (1280, 16826), (1432, 15040), (1504, 14320), (1790, 12032), (1880, 11456), (2560, 8413), (2864, 7520), (3008, 7160), (3580, 6016), (3760, 5728)]