127920280

素因数分解:

$2^3\times 5^1\times {\mathrm{3198007}}^1$

素因数の和:3198018

約数の個数: 16

約数和(自身を含む): 287820720

約数和(自身を除く): 159900440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3198007, 6396014, 12792028, 15990035, 25584056, 31980070, 63960140, 127920280]

約数ペア:

[(1, 127920280), (2, 63960140), (4, 31980070), (5, 25584056), (8, 15990035), (10, 12792028), (20, 6396014), (40, 3198007)]