21000668

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{1609}}^1$

素因数の和:1877

約数の個数: 24

約数和(自身を含む): 39760560

約数和(自身を除く): 18759892

約数列:

[1, 2, 4, 13, 26, 52, 251, 502, 1004, 1609, 3218, 3263, 6436, 6526, 13052, 20917, 41834, 83668, 403859, 807718, 1615436, 5250167, 10500334, 21000668]

約数ペア:

[(1, 21000668), (2, 10500334), (4, 5250167), (13, 1615436), (26, 807718), (52, 403859), (251, 83668), (502, 41834), (1004, 20917), (1609, 13052), (3218, 6526), (3263, 6436)]