20935180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{229}}^1\times {\mathrm{653}}^1$

素因数の和:898

約数の個数: 48

約数和(自身を含む): 50541120

約数和(自身を除く): 29605940

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 229, 458, 653, 916, 1145, 1306, 1603, 2290, 2612, 3206, 3265, 4571, 4580, 6412, 6530, 8015, 9142, 13060, 16030, 18284, 22855, 32060, 45710, 91420, 149537, 299074, 598148, 747685, 1046759, 1495370, 2093518, 2990740, 4187036, 5233795, 10467590, 20935180]

約数ペア:

[(1, 20935180), (2, 10467590), (4, 5233795), (5, 4187036), (7, 2990740), (10, 2093518), (14, 1495370), (20, 1046759), (28, 747685), (35, 598148), (70, 299074), (140, 149537), (229, 91420), (458, 45710), (653, 32060), (916, 22855), (1145, 18284), (1306, 16030), (1603, 13060), (2290, 9142), (2612, 8015), (3206, 6530), (3265, 6412), (4571, 4580)]