21915369

素因数分解:

$3^2\times 7^1\times {\mathrm{541}}^1\times {\mathrm{643}}^1$

素因数の和:1197

約数の個数: 24

約数和(自身を含む): 36300992

約数和(自身を除く): 14385623

約数列:

[1, 3, 7, 9, 21, 63, 541, 643, 1623, 1929, 3787, 4501, 4869, 5787, 11361, 13503, 34083, 40509, 347863, 1043589, 2435041, 3130767, 7305123, 21915369]

約数ペア:

[(1, 21915369), (3, 7305123), (7, 3130767), (9, 2435041), (21, 1043589), (63, 347863), (541, 40509), (643, 34083), (1623, 13503), (1929, 11361), (3787, 5787), (4501, 4869)]