28921809

素因数分解:

$3^1\times 7^2\times {\mathrm{181}}^1\times {\mathrm{1087}}^1$

素因数の和:1285

約数の個数: 24

約数和(自身を含む): 45147648

約数和(自身を除く): 16225839

約数列:

[1, 3, 7, 21, 49, 147, 181, 543, 1087, 1267, 3261, 3801, 7609, 8869, 22827, 26607, 53263, 159789, 196747, 590241, 1377229, 4131687, 9640603, 28921809]

約数ペア:

[(1, 28921809), (3, 9640603), (7, 4131687), (21, 1377229), (49, 590241), (147, 196747), (181, 159789), (543, 53263), (1087, 26607), (1267, 22827), (3261, 8869), (3801, 7609)]