660856540

素因数分解:

$2^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{389}}^1\times {\mathrm{491}}^1$

素因数の和:1062

約数の個数: 48

約数和(自身を含む): 1402259040

約数和(自身を除く): 741402500

約数列:

[1, 2, 4, 5, 10, 20, 173, 346, 389, 491, 692, 778, 865, 982, 1556, 1730, 1945, 1964, 2455, 3460, 3890, 4910, 7780, 9820, 67297, 84943, 134594, 169886, 190999, 269188, 336485, 339772, 381998, 424715, 672970, 763996, 849430, 954995, 1345940, 1698860, 1909990, 3819980, 33042827, 66085654, 132171308, 165214135, 330428270, 660856540]

約数ペア:

[(1, 660856540), (2, 330428270), (4, 165214135), (5, 132171308), (10, 66085654), (20, 33042827), (173, 3819980), (346, 1909990), (389, 1698860), (491, 1345940), (692, 954995), (778, 849430), (865, 763996), (982, 672970), (1556, 424715), (1730, 381998), (1945, 339772), (1964, 336485), (2455, 269188), (3460, 190999), (3890, 169886), (4910, 134594), (7780, 84943), (9820, 67297)]