20447553

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7321}}^1$

素因数の和:7357

約数の個数: 24

約数和(自身を含む): 33388320

約数和(自身を除く): 12940767

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7321, 21963, 51247, 139099, 153741, 358729, 417297, 973693, 1076187, 2921079, 6815851, 20447553]

約数ペア:

[(1, 20447553), (3, 6815851), (7, 2921079), (19, 1076187), (21, 973693), (49, 417297), (57, 358729), (133, 153741), (147, 139099), (399, 51247), (931, 21963), (2793, 7321)]