20637680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{269}}^1$

素因数の和:426

約数の個数: 80

約数和(自身を含む): 55442880

約数和(自身を除く): 34805200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 137, 140, 269, 274, 280, 538, 548, 560, 685, 959, 1076, 1096, 1345, 1370, 1883, 1918, 2152, 2192, 2690, 2740, 3766, 3836, 4304, 4795, 5380, 5480, 7532, 7672, 9415, 9590, 10760, 10960, 15064, 15344, 18830, 19180, 21520, 30128, 36853, 37660, 38360, 73706, 75320, 76720, 147412, 150640, 184265, 257971, 294824, 368530, 515942, 589648, 737060, 1031884, 1289855, 1474120, 2063768, 2579710, 2948240, 4127536, 5159420, 10318840, 20637680]

約数ペア:

[(1, 20637680), (2, 10318840), (4, 5159420), (5, 4127536), (7, 2948240), (8, 2579710), (10, 2063768), (14, 1474120), (16, 1289855), (20, 1031884), (28, 737060), (35, 589648), (40, 515942), (56, 368530), (70, 294824), (80, 257971), (112, 184265), (137, 150640), (140, 147412), (269, 76720), (274, 75320), (280, 73706), (538, 38360), (548, 37660), (560, 36853), (685, 30128), (959, 21520), (1076, 19180), (1096, 18830), (1345, 15344), (1370, 15064), (1883, 10960), (1918, 10760), (2152, 9590), (2192, 9415), (2690, 7672), (2740, 7532), (3766, 5480), (3836, 5380), (4304, 4795)]