19988865

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{727}}^1$

素因数の和:798

約数の個数: 48

約数和(自身を含む): 38158848

約数和(自身を除く): 18169983

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 47, 65, 117, 141, 195, 235, 423, 585, 611, 705, 727, 1833, 2115, 2181, 3055, 3635, 5499, 6543, 9165, 9451, 10905, 27495, 28353, 32715, 34169, 47255, 85059, 102507, 141765, 170845, 307521, 425295, 444197, 512535, 1332591, 1537605, 2220985, 3997773, 6662955, 19988865]

約数ペア:

[(1, 19988865), (3, 6662955), (5, 3997773), (9, 2220985), (13, 1537605), (15, 1332591), (39, 512535), (45, 444197), (47, 425295), (65, 307521), (117, 170845), (141, 141765), (195, 102507), (235, 85059), (423, 47255), (585, 34169), (611, 32715), (705, 28353), (727, 27495), (1833, 10905), (2115, 9451), (2181, 9165), (3055, 6543), (3635, 5499)]