20970243

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{17519}}^1$

素因数の和:17551

約数の個数: 24

約数和(自身を含む): 36441600

約数和(自身を除く): 15471357

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 17519, 52557, 122633, 157671, 332861, 367899, 998583, 1103697, 2330027, 2995749, 6990081, 20970243]

約数ペア:

[(1, 20970243), (3, 6990081), (7, 2995749), (9, 2330027), (19, 1103697), (21, 998583), (57, 367899), (63, 332861), (133, 157671), (171, 122633), (399, 52557), (1197, 17519)]