20515820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4153}}^1$

素因数の和:4194

約数の個数: 48

約数和(自身を含む): 48851040

約数和(自身を除く): 28335220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4153, 4940, 8306, 16612, 20765, 41530, 53989, 78907, 83060, 107978, 157814, 215956, 269945, 315628, 394535, 539890, 789070, 1025791, 1079780, 1578140, 2051582, 4103164, 5128955, 10257910, 20515820]

約数ペア:

[(1, 20515820), (2, 10257910), (4, 5128955), (5, 4103164), (10, 2051582), (13, 1578140), (19, 1079780), (20, 1025791), (26, 789070), (38, 539890), (52, 394535), (65, 315628), (76, 269945), (95, 215956), (130, 157814), (190, 107978), (247, 83060), (260, 78907), (380, 53989), (494, 41530), (988, 20765), (1235, 16612), (2470, 8306), (4153, 4940)]