21289480

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{18353}}^1$

素因数の和:18393

約数の個数: 32

約数和(自身を含む): 49555800

約数和(自身を除く): 28266320

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 18353, 36706, 73412, 91765, 146824, 183530, 367060, 532237, 734120, 1064474, 2128948, 2661185, 4257896, 5322370, 10644740, 21289480]

約数ペア:

[(1, 21289480), (2, 10644740), (4, 5322370), (5, 4257896), (8, 2661185), (10, 2128948), (20, 1064474), (29, 734120), (40, 532237), (58, 367060), (116, 183530), (145, 146824), (232, 91765), (290, 73412), (580, 36706), (1160, 18353)]