20617220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{443}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 46992960

約数和(自身を除く): 26375740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 179, 260, 358, 443, 716, 886, 895, 1772, 1790, 2215, 2327, 3580, 4430, 4654, 5759, 8860, 9308, 11518, 11635, 23036, 23270, 28795, 46540, 57590, 79297, 115180, 158594, 317188, 396485, 792970, 1030861, 1585940, 2061722, 4123444, 5154305, 10308610, 20617220]

約数ペア:

[(1, 20617220), (2, 10308610), (4, 5154305), (5, 4123444), (10, 2061722), (13, 1585940), (20, 1030861), (26, 792970), (52, 396485), (65, 317188), (130, 158594), (179, 115180), (260, 79297), (358, 57590), (443, 46540), (716, 28795), (886, 23270), (895, 23036), (1772, 11635), (1790, 11518), (2215, 9308), (2327, 8860), (3580, 5759), (4430, 4654)]