128672020

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{30491}}^1$

素因数の和:30711

約数の個数: 24

約数和(自身を含む): 271500768

約数和(自身を除く): 142828748

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 30491, 60982, 121964, 152455, 304910, 609820, 6433601, 12867202, 25734404, 32168005, 64336010, 128672020]

約数ペア:

[(1, 128672020), (2, 64336010), (4, 32168005), (5, 25734404), (10, 12867202), (20, 6433601), (211, 609820), (422, 304910), (844, 152455), (1055, 121964), (2110, 60982), (4220, 30491)]