21720625984

素因数分解:

$2^6\times {\mathrm{4391}}^1\times {\mathrm{77291}}^1$

素因数の和:81694

約数の個数: 28

約数和(自身を含む): 43112240928

約数和(自身を除く): 21391614944

約数列:

[1, 2, 4, 8, 16, 32, 64, 4391, 8782, 17564, 35128, 70256, 77291, 140512, 154582, 281024, 309164, 618328, 1236656, 2473312, 4946624, 339384781, 678769562, 1357539124, 2715078248, 5430156496, 10860312992, 21720625984]

約数ペア:

[(1, 21720625984), (2, 10860312992), (4, 5430156496), (8, 2715078248), (16, 1357539124), (32, 678769562), (64, 339384781), (4391, 4946624), (8782, 2473312), (17564, 1236656), (35128, 618328), (70256, 309164), (77291, 281024), (140512, 154582)]