21646940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{154621}}^1$

素因数の和:154637

約数の個数: 24

約数和(自身を含む): 51952992

約数和(自身を除く): 30306052

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 154621, 309242, 618484, 773105, 1082347, 1546210, 2164694, 3092420, 4329388, 5411735, 10823470, 21646940]

約数ペア:

[(1, 21646940), (2, 10823470), (4, 5411735), (5, 4329388), (7, 3092420), (10, 2164694), (14, 1546210), (20, 1082347), (28, 773105), (35, 618484), (70, 309242), (140, 154621)]