678458420

素因数分解:

$2^2\times 5^1\times {\mathrm{991}}^1\times {\mathrm{34231}}^1$

素因数の和:35231

約数の個数: 24

約数和(自身を含む): 1426242048

約数和(自身を除く): 747783628

約数列:

[1, 2, 4, 5, 10, 20, 991, 1982, 3964, 4955, 9910, 19820, 34231, 68462, 136924, 171155, 342310, 684620, 33922921, 67845842, 135691684, 169614605, 339229210, 678458420]

約数ペア:

[(1, 678458420), (2, 339229210), (4, 169614605), (5, 135691684), (10, 67845842), (20, 33922921), (991, 684620), (1982, 342310), (3964, 171155), (4955, 136924), (9910, 68462), (19820, 34231)]