21337280

素因数分解:

$2^6\times 5^1\times {\mathrm{131}}^1\times {\mathrm{509}}^1$

素因数の和:657

約数の個数: 56

約数和(自身を含む): 51297840

約数和(自身を除く): 29960560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 131, 160, 262, 320, 509, 524, 655, 1018, 1048, 1310, 2036, 2096, 2545, 2620, 4072, 4192, 5090, 5240, 8144, 8384, 10180, 10480, 16288, 20360, 20960, 32576, 40720, 41920, 66679, 81440, 133358, 162880, 266716, 333395, 533432, 666790, 1066864, 1333580, 2133728, 2667160, 4267456, 5334320, 10668640, 21337280]

約数ペア:

[(1, 21337280), (2, 10668640), (4, 5334320), (5, 4267456), (8, 2667160), (10, 2133728), (16, 1333580), (20, 1066864), (32, 666790), (40, 533432), (64, 333395), (80, 266716), (131, 162880), (160, 133358), (262, 81440), (320, 66679), (509, 41920), (524, 40720), (655, 32576), (1018, 20960), (1048, 20360), (1310, 16288), (2036, 10480), (2096, 10180), (2545, 8384), (2620, 8144), (4072, 5240), (4192, 5090)]