21877660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{156269}}^1$

素因数の和:156285

約数の個数: 24

約数和(自身を含む): 52506720

約数和(自身を除く): 30629060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 156269, 312538, 625076, 781345, 1093883, 1562690, 2187766, 3125380, 4375532, 5469415, 10938830, 21877660]

約数ペア:

[(1, 21877660), (2, 10938830), (4, 5469415), (5, 4375532), (7, 3125380), (10, 2187766), (14, 1562690), (20, 1093883), (28, 781345), (35, 625076), (70, 312538), (140, 156269)]