21880420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{35291}}^1$

素因数の和:35331

約数の個数: 24

約数和(自身を含む): 47432448

約数和(自身を除く): 25552028

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 35291, 70582, 141164, 176455, 352910, 705820, 1094021, 2188042, 4376084, 5470105, 10940210, 21880420]

約数ペア:

[(1, 21880420), (2, 10940210), (4, 5470105), (5, 4376084), (10, 2188042), (20, 1094021), (31, 705820), (62, 352910), (124, 176455), (155, 141164), (310, 70582), (620, 35291)]