21000912568

素因数分解:

$2^3\times {\mathrm{1609}}^1\times {\mathrm{1631519}}^1$

素因数の和:1633134

約数の個数: 16

約数和(自身を含む): 39401208000

約数和(自身を除く): 18400295432

約数列:

[1, 2, 4, 8, 1609, 3218, 6436, 12872, 1631519, 3263038, 6526076, 13052152, 2625114071, 5250228142, 10500456284, 21000912568]

約数ペア:

[(1, 21000912568), (2, 10500456284), (4, 5250228142), (8, 2625114071), (1609, 13052152), (3218, 6526076), (6436, 3263038), (12872, 1631519)]