1278280

素因数分解:

$2^3\times 5^1\times {\mathrm{31957}}^1$

素因数の和:31968

約数の個数: 16

約数和(自身を含む): 2876220

約数和(自身を除く): 1597940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 31957, 63914, 127828, 159785, 255656, 319570, 639140, 1278280]

約数ペア:

[(1, 1278280), (2, 639140), (4, 319570), (5, 255656), (8, 159785), (10, 127828), (20, 63914), (40, 31957)]