20121855

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5431}}^1$

素因数の和:5471

約数の個数: 32

約数和(自身を含む): 36503040

約数和(自身を除く): 16381185

約数列:

[1, 3, 5, 13, 15, 19, 39, 57, 65, 95, 195, 247, 285, 741, 1235, 3705, 5431, 16293, 27155, 70603, 81465, 103189, 211809, 309567, 353015, 515945, 1059045, 1341457, 1547835, 4024371, 6707285, 20121855]

約数ペア:

[(1, 20121855), (3, 6707285), (5, 4024371), (13, 1547835), (15, 1341457), (19, 1059045), (39, 515945), (57, 353015), (65, 309567), (95, 211809), (195, 103189), (247, 81465), (285, 70603), (741, 27155), (1235, 16293), (3705, 5431)]