21167369680

素因数分解:

$2^4\times 5^1\times {\mathrm{264592121}}^1$

素因数の和:264592134

約数の個数: 20

約数和(自身を含む): 49214134692

約数和(自身を除く): 28046765012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264592121, 529184242, 1058368484, 1322960605, 2116736968, 2645921210, 4233473936, 5291842420, 10583684840, 21167369680]

約数ペア:

[(1, 21167369680), (2, 10583684840), (4, 5291842420), (5, 4233473936), (8, 2645921210), (10, 2116736968), (16, 1322960605), (20, 1058368484), (40, 529184242), (80, 264592121)]