129243640

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{31991}}^1$

素因数の和:32103

約数の個数: 32

約数和(自身を含む): 293686560

約数和(自身を除く): 164442920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 31991, 63982, 127964, 159955, 255928, 319910, 639820, 1279640, 3231091, 6462182, 12924364, 16155455, 25848728, 32310910, 64621820, 129243640]

約数ペア:

[(1, 129243640), (2, 64621820), (4, 32310910), (5, 25848728), (8, 16155455), (10, 12924364), (20, 6462182), (40, 3231091), (101, 1279640), (202, 639820), (404, 319910), (505, 255928), (808, 159955), (1010, 127964), (2020, 63982), (4040, 31991)]