20903253

素因数分解:

$3^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{2683}}^1$

素因数の和:2753

約数の個数: 24

約数和(自身を含む): 33045408

約数和(自身を除く): 12142155

約数列:

[1, 3, 7, 21, 49, 53, 147, 159, 371, 1113, 2597, 2683, 7791, 8049, 18781, 56343, 131467, 142199, 394401, 426597, 995393, 2986179, 6967751, 20903253]

約数ペア:

[(1, 20903253), (3, 6967751), (7, 2986179), (21, 995393), (49, 426597), (53, 394401), (147, 142199), (159, 131467), (371, 56343), (1113, 18781), (2597, 8049), (2683, 7791)]