21520149

素因数分解:

$3^1\times 7^1\times {\mathrm{569}}^1\times {\mathrm{1801}}^1$

素因数の和:2380

約数の個数: 16

約数和(自身を含む): 32868480

約数和(自身を除く): 11348331

約数列:

[1, 3, 7, 21, 569, 1707, 1801, 3983, 5403, 11949, 12607, 37821, 1024769, 3074307, 7173383, 21520149]

約数ペア:

[(1, 21520149), (3, 7173383), (7, 3074307), (21, 1024769), (569, 37821), (1707, 12607), (1801, 11949), (3983, 5403)]