21240420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{354007}}^1$

素因数の和:354019

約数の個数: 24

約数和(自身を含む): 59473344

約数和(自身を除く): 38232924

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 354007, 708014, 1062021, 1416028, 1770035, 2124042, 3540070, 4248084, 5310105, 7080140, 10620210, 21240420]

約数ペア:

[(1, 21240420), (2, 10620210), (3, 7080140), (4, 5310105), (5, 4248084), (6, 3540070), (10, 2124042), (12, 1770035), (15, 1416028), (20, 1062021), (30, 708014), (60, 354007)]