128719780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{919427}}^1$

素因数の和:919443

約数の個数: 24

約数和(自身を含む): 308927808

約数和(自身を除く): 180208028

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 919427, 1838854, 3677708, 4597135, 6435989, 9194270, 12871978, 18388540, 25743956, 32179945, 64359890, 128719780]

約数ペア:

[(1, 128719780), (2, 64359890), (4, 32179945), (5, 25743956), (7, 18388540), (10, 12871978), (14, 9194270), (20, 6435989), (28, 4597135), (35, 3677708), (70, 1838854), (140, 919427)]