20652640

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4451}}^1$

素因数の和:4495

約数の個数: 48

約数和(自身を含む): 50485680

約数和(自身を除く): 29833040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 80, 116, 145, 160, 232, 290, 464, 580, 928, 1160, 2320, 4451, 4640, 8902, 17804, 22255, 35608, 44510, 71216, 89020, 129079, 142432, 178040, 258158, 356080, 516316, 645395, 712160, 1032632, 1290790, 2065264, 2581580, 4130528, 5163160, 10326320, 20652640]

約数ペア:

[(1, 20652640), (2, 10326320), (4, 5163160), (5, 4130528), (8, 2581580), (10, 2065264), (16, 1290790), (20, 1032632), (29, 712160), (32, 645395), (40, 516316), (58, 356080), (80, 258158), (116, 178040), (145, 142432), (160, 129079), (232, 89020), (290, 71216), (464, 44510), (580, 35608), (928, 22255), (1160, 17804), (2320, 8902), (4451, 4640)]