21990549

素因数分解:

$3^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{6053}}^1$

素因数の和:6236

約数の個数: 16

約数和(自身を含む): 33708672

約数和(自身を除く): 11718123

約数列:

[1, 3, 7, 21, 173, 519, 1211, 3633, 6053, 18159, 42371, 127113, 1047169, 3141507, 7330183, 21990549]

約数ペア:

[(1, 21990549), (3, 7330183), (7, 3141507), (21, 1047169), (173, 127113), (519, 42371), (1211, 18159), (3633, 6053)]