19689100

素因数分解:

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

素因数の和:906

約数の個数: 36

約数和(自身を含む): 42919128

約数和(自身を除く): 23230028

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 401, 491, 802, 982, 1604, 1964, 2005, 2455, 4010, 4910, 8020, 9820, 10025, 12275, 20050, 24550, 40100, 49100, 196891, 393782, 787564, 984455, 1968910, 3937820, 4922275, 9844550, 19689100]

約数ペア:

[(1, 19689100), (2, 9844550), (4, 4922275), (5, 3937820), (10, 1968910), (20, 984455), (25, 787564), (50, 393782), (100, 196891), (401, 49100), (491, 40100), (802, 24550), (982, 20050), (1604, 12275), (1964, 10025), (2005, 9820), (2455, 8020), (4010, 4910)]