18639009

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{223}}^1\times {\mathrm{251}}^1$

素因数の和:517

約数の個数: 24

約数和(自身を含む): 27885312

約数和(自身を除く): 9246303

約数列:

[1, 3, 9, 37, 111, 223, 251, 333, 669, 753, 2007, 2259, 8251, 9287, 24753, 27861, 55973, 74259, 83583, 167919, 503757, 2071001, 6213003, 18639009]

約数ペア:

[(1, 18639009), (3, 6213003), (9, 2071001), (37, 503757), (111, 167919), (223, 83583), (251, 74259), (333, 55973), (669, 27861), (753, 24753), (2007, 9287), (2259, 8251)]