21479780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{153427}}^1$

素因数の和:153443

約数の個数: 24

約数和(自身を含む): 51551808

約数和(自身を除く): 30072028

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 153427, 306854, 613708, 767135, 1073989, 1534270, 2147978, 3068540, 4295956, 5369945, 10739890, 21479780]

約数ペア:

[(1, 21479780), (2, 10739890), (4, 5369945), (5, 4295956), (7, 3068540), (10, 2147978), (14, 1534270), (20, 1073989), (28, 767135), (35, 613708), (70, 306854), (140, 153427)]