21377660

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{557}}^1$

素因数の和:686

約数の個数: 48

約数和(自身を含む): 47809440

約数和(自身を除く): 26431780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 101, 190, 202, 380, 404, 505, 557, 1010, 1114, 1919, 2020, 2228, 2785, 3838, 5570, 7676, 9595, 10583, 11140, 19190, 21166, 38380, 42332, 52915, 56257, 105830, 112514, 211660, 225028, 281285, 562570, 1068883, 1125140, 2137766, 4275532, 5344415, 10688830, 21377660]

約数ペア:

[(1, 21377660), (2, 10688830), (4, 5344415), (5, 4275532), (10, 2137766), (19, 1125140), (20, 1068883), (38, 562570), (76, 281285), (95, 225028), (101, 211660), (190, 112514), (202, 105830), (380, 56257), (404, 52915), (505, 42332), (557, 38380), (1010, 21166), (1114, 19190), (1919, 11140), (2020, 10583), (2228, 9595), (2785, 7676), (3838, 5570)]