18991413

素因数分解:

$3^2\times 7^1\times {\mathrm{251}}^1\times {\mathrm{1201}}^1$

素因数の和:1465

約数の個数: 24

約数和(自身を含む): 31502016

約数和(自身を除く): 12510603

約数列:

[1, 3, 7, 9, 21, 63, 251, 753, 1201, 1757, 2259, 3603, 5271, 8407, 10809, 15813, 25221, 75663, 301451, 904353, 2110157, 2713059, 6330471, 18991413]

約数ペア:

[(1, 18991413), (3, 6330471), (7, 2713059), (9, 2110157), (21, 904353), (63, 301451), (251, 75663), (753, 25221), (1201, 15813), (1757, 10809), (2259, 8407), (3603, 5271)]