21103516

素因数分解:

$2^2\times 7^2\times {\mathrm{107671}}^1$

素因数の和:107689

約数の個数: 18

約数和(自身を含む): 42961128

約数和(自身を除く): 21857612

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 107671, 215342, 430684, 753697, 1507394, 3014788, 5275879, 10551758, 21103516]

約数ペア:

[(1, 21103516), (2, 10551758), (4, 5275879), (7, 3014788), (14, 1507394), (28, 753697), (49, 430684), (98, 215342), (196, 107671)]