18815985

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{373}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 35006400

約数和(自身を除く): 16190415

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 59, 95, 171, 177, 285, 295, 373, 531, 855, 885, 1119, 1121, 1865, 2655, 3357, 3363, 5595, 5605, 7087, 10089, 16785, 16815, 21261, 22007, 35435, 50445, 63783, 66021, 106305, 110035, 198063, 318915, 330105, 418133, 990315, 1254399, 2090665, 3763197, 6271995, 18815985]

約数ペア:

[(1, 18815985), (3, 6271995), (5, 3763197), (9, 2090665), (15, 1254399), (19, 990315), (45, 418133), (57, 330105), (59, 318915), (95, 198063), (171, 110035), (177, 106305), (285, 66021), (295, 63783), (373, 50445), (531, 35435), (855, 22007), (885, 21261), (1119, 16815), (1121, 16785), (1865, 10089), (2655, 7087), (3357, 5605), (3363, 5595)]