128940880

素因数分解:

$2^4\times 5^1\times {\mathrm{1611761}}^1$

素因数の和:1611774

約数の個数: 20

約数和(自身を含む): 299787732

約数和(自身を除く): 170846852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1611761, 3223522, 6447044, 8058805, 12894088, 16117610, 25788176, 32235220, 64470440, 128940880]

約数ペア:

[(1, 128940880), (2, 64470440), (4, 32235220), (5, 25788176), (8, 16117610), (10, 12894088), (16, 8058805), (20, 6447044), (40, 3223522), (80, 1611761)]