21000340840

素因数分解:

$2^3\times 5^1\times {\mathrm{525008521}}^1$

素因数の和:525008532

約数の個数: 16

約数和(自身を含む): 47250766980

約数和(自身を除く): 26250426140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 525008521, 1050017042, 2100034084, 2625042605, 4200068168, 5250085210, 10500170420, 21000340840]

約数ペア:

[(1, 21000340840), (2, 10500170420), (4, 5250085210), (5, 4200068168), (8, 2625042605), (10, 2100034084), (20, 1050017042), (40, 525008521)]