78756400

素因数分解:

$2^4\times 5^2\times {\mathrm{401}}^1\times {\mathrm{491}}^1$

素因数の和:910

約数の個数: 60

約数和(自身を含む): 190070424

約数和(自身を除く): 111314024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 401, 491, 802, 982, 1604, 1964, 2005, 2455, 3208, 3928, 4010, 4910, 6416, 7856, 8020, 9820, 10025, 12275, 16040, 19640, 20050, 24550, 32080, 39280, 40100, 49100, 80200, 98200, 160400, 196400, 196891, 393782, 787564, 984455, 1575128, 1968910, 3150256, 3937820, 4922275, 7875640, 9844550, 15751280, 19689100, 39378200, 78756400]

約数ペア:

[(1, 78756400), (2, 39378200), (4, 19689100), (5, 15751280), (8, 9844550), (10, 7875640), (16, 4922275), (20, 3937820), (25, 3150256), (40, 1968910), (50, 1575128), (80, 984455), (100, 787564), (200, 393782), (400, 196891), (401, 196400), (491, 160400), (802, 98200), (982, 80200), (1604, 49100), (1964, 40100), (2005, 39280), (2455, 32080), (3208, 24550), (3928, 20050), (4010, 19640), (4910, 16040), (6416, 12275), (7856, 10025), (8020, 9820)]