21384820

素因数分解:

$2^2\times 5^1\times {\mathrm{317}}^1\times {\mathrm{3373}}^1$

素因数の和:3699

約数の個数: 24

約数和(自身を含む): 45063144

約数和(自身を除く): 23678324

約数列:

[1, 2, 4, 5, 10, 20, 317, 634, 1268, 1585, 3170, 3373, 6340, 6746, 13492, 16865, 33730, 67460, 1069241, 2138482, 4276964, 5346205, 10692410, 21384820]

約数ペア:

[(1, 21384820), (2, 10692410), (4, 5346205), (5, 4276964), (10, 2138482), (20, 1069241), (317, 67460), (634, 33730), (1268, 16865), (1585, 13492), (3170, 6746), (3373, 6340)]