19919912

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{173}}^1\times {\mathrm{389}}^1$

素因数の和:605

約数の個数: 32

約数和(自身を含む): 38680200

約数和(自身を除く): 18760288

約数列:

[1, 2, 4, 8, 37, 74, 148, 173, 296, 346, 389, 692, 778, 1384, 1556, 3112, 6401, 12802, 14393, 25604, 28786, 51208, 57572, 67297, 115144, 134594, 269188, 538376, 2489989, 4979978, 9959956, 19919912]

約数ペア:

[(1, 19919912), (2, 9959956), (4, 4979978), (8, 2489989), (37, 538376), (74, 269188), (148, 134594), (173, 115144), (296, 67297), (346, 57572), (389, 51208), (692, 28786), (778, 25604), (1384, 14393), (1556, 12802), (3112, 6401)]