18921133

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{251}}^1$

素因数の和:369

約数の個数: 24

約数和(自身を含む): 24131520

約数和(自身を除く): 5210387

約数列:

[1, 7, 11, 77, 89, 121, 251, 623, 847, 979, 1757, 2761, 6853, 10769, 19327, 22339, 30371, 75383, 156373, 212597, 245729, 1720103, 2703019, 18921133]

約数ペア:

[(1, 18921133), (7, 2703019), (11, 1720103), (77, 245729), (89, 212597), (121, 156373), (251, 75383), (623, 30371), (847, 22339), (979, 19327), (1757, 10769), (2761, 6853)]