21568640

素因数分解:

$2^7\times 5^1\times {\mathrm{67}}^1\times {\mathrm{503}}^1$

素因数の和:589

約数の個数: 64

約数和(自身を含む): 52436160

約数和(自身を除く): 30867520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 67, 80, 128, 134, 160, 268, 320, 335, 503, 536, 640, 670, 1006, 1072, 1340, 2012, 2144, 2515, 2680, 4024, 4288, 5030, 5360, 8048, 8576, 10060, 10720, 16096, 20120, 21440, 32192, 33701, 40240, 42880, 64384, 67402, 80480, 134804, 160960, 168505, 269608, 321920, 337010, 539216, 674020, 1078432, 1348040, 2156864, 2696080, 4313728, 5392160, 10784320, 21568640]

約数ペア:

[(1, 21568640), (2, 10784320), (4, 5392160), (5, 4313728), (8, 2696080), (10, 2156864), (16, 1348040), (20, 1078432), (32, 674020), (40, 539216), (64, 337010), (67, 321920), (80, 269608), (128, 168505), (134, 160960), (160, 134804), (268, 80480), (320, 67402), (335, 64384), (503, 42880), (536, 40240), (640, 33701), (670, 32192), (1006, 21440), (1072, 20120), (1340, 16096), (2012, 10720), (2144, 10060), (2515, 8576), (2680, 8048), (4024, 5360), (4288, 5030)]