21237740

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{337}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 47017152

約数和(自身を除く): 25779412

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 137, 230, 274, 337, 460, 548, 674, 685, 1348, 1370, 1685, 2740, 3151, 3370, 6302, 6740, 7751, 12604, 15502, 15755, 31004, 31510, 38755, 46169, 63020, 77510, 92338, 155020, 184676, 230845, 461690, 923380, 1061887, 2123774, 4247548, 5309435, 10618870, 21237740]

約数ペア:

[(1, 21237740), (2, 10618870), (4, 5309435), (5, 4247548), (10, 2123774), (20, 1061887), (23, 923380), (46, 461690), (92, 230845), (115, 184676), (137, 155020), (230, 92338), (274, 77510), (337, 63020), (460, 46169), (548, 38755), (674, 31510), (685, 31004), (1348, 15755), (1370, 15502), (1685, 12604), (2740, 7751), (3151, 6740), (3370, 6302)]