19991727

素因数分解:

$3^2\times 7^1\times {\mathrm{223}}^1\times {\mathrm{1423}}^1$

素因数の和:1659

約数の個数: 24

約数和(自身を含む): 33173504

約数和(自身を除く): 13181777

約数列:

[1, 3, 7, 9, 21, 63, 223, 669, 1423, 1561, 2007, 4269, 4683, 9961, 12807, 14049, 29883, 89649, 317329, 951987, 2221303, 2855961, 6663909, 19991727]

約数ペア:

[(1, 19991727), (3, 6663909), (7, 2855961), (9, 2221303), (21, 951987), (63, 317329), (223, 89649), (669, 29883), (1423, 14049), (1561, 12807), (2007, 9961), (4269, 4683)]