21370420

素因数分解:

$2^2\times 5^1\times {\mathrm{983}}^1\times {\mathrm{1087}}^1$

素因数の和:2079

約数の個数: 24

約数和(自身を含む): 44964864

約数和(自身を除く): 23594444

約数列:

[1, 2, 4, 5, 10, 20, 983, 1087, 1966, 2174, 3932, 4348, 4915, 5435, 9830, 10870, 19660, 21740, 1068521, 2137042, 4274084, 5342605, 10685210, 21370420]

約数ペア:

[(1, 21370420), (2, 10685210), (4, 5342605), (5, 4274084), (10, 2137042), (20, 1068521), (983, 21740), (1087, 19660), (1966, 10870), (2174, 9830), (3932, 5435), (4348, 4915)]