388908040

素因数分解:

$2^3\times 5^1\times {\mathrm{991}}^1\times {\mathrm{9811}}^1$

素因数の和:10813

約数の個数: 32

約数和(自身を含む): 876015360

約数和(自身を除く): 487107320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 991, 1982, 3964, 4955, 7928, 9811, 9910, 19622, 19820, 39244, 39640, 49055, 78488, 98110, 196220, 392440, 9722701, 19445402, 38890804, 48613505, 77781608, 97227010, 194454020, 388908040]

約数ペア:

[(1, 388908040), (2, 194454020), (4, 97227010), (5, 77781608), (8, 48613505), (10, 38890804), (20, 19445402), (40, 9722701), (991, 392440), (1982, 196220), (3964, 98110), (4955, 78488), (7928, 49055), (9811, 39640), (9910, 39244), (19622, 19820)]