18886855

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{373}}^1$

素因数の和:451

約数の個数: 32

約数和(自身を含む): 26389440

約数和(自身を除く): 7502585

約数列:

[1, 5, 13, 19, 41, 65, 95, 205, 247, 373, 533, 779, 1235, 1865, 2665, 3895, 4849, 7087, 10127, 15293, 24245, 35435, 50635, 76465, 92131, 198809, 290567, 460655, 994045, 1452835, 3777371, 18886855]

約数ペア:

[(1, 18886855), (5, 3777371), (13, 1452835), (19, 994045), (41, 460655), (65, 290567), (95, 198809), (205, 92131), (247, 76465), (373, 50635), (533, 35435), (779, 24245), (1235, 15293), (1865, 10127), (2665, 7087), (3895, 4849)]