21000391636

素因数分解:

$2^2\times 7^1\times {\mathrm{750013987}}^1$

素因数の和:750013998

約数の個数: 12

約数和(自身を含む): 42000783328

約数和(自身を除く): 21000391692

約数列:

[1, 2, 4, 7, 14, 28, 750013987, 1500027974, 3000055948, 5250097909, 10500195818, 21000391636]

約数ペア:

[(1, 21000391636), (2, 10500195818), (4, 5250097909), (7, 3000055948), (14, 1500027974), (28, 750013987)]