1640692880

素因数分解:

$2^4\times 5^1\times {\mathrm{20508661}}^1$

素因数の和:20508674

約数の個数: 20

約数和(自身を含む): 3814611132

約数和(自身を除く): 2173918252

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 20508661, 41017322, 82034644, 102543305, 164069288, 205086610, 328138576, 410173220, 820346440, 1640692880]

約数ペア:

[(1, 1640692880), (2, 820346440), (4, 410173220), (5, 328138576), (8, 205086610), (10, 164069288), (16, 102543305), (20, 82034644), (40, 41017322), (80, 20508661)]