77680720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{661}}^1$

素因数の和:800

約数の個数: 80

約数和(自身を含む): 196518672

約数和(自身を除く): 118837952

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 113, 130, 208, 226, 260, 452, 520, 565, 661, 904, 1040, 1130, 1322, 1469, 1808, 2260, 2644, 2938, 3305, 4520, 5288, 5876, 6610, 7345, 8593, 9040, 10576, 11752, 13220, 14690, 17186, 23504, 26440, 29380, 34372, 42965, 52880, 58760, 68744, 74693, 85930, 117520, 137488, 149386, 171860, 298772, 343720, 373465, 597544, 687440, 746930, 971009, 1195088, 1493860, 1942018, 2987720, 3884036, 4855045, 5975440, 7768072, 9710090, 15536144, 19420180, 38840360, 77680720]

約数ペア:

[(1, 77680720), (2, 38840360), (4, 19420180), (5, 15536144), (8, 9710090), (10, 7768072), (13, 5975440), (16, 4855045), (20, 3884036), (26, 2987720), (40, 1942018), (52, 1493860), (65, 1195088), (80, 971009), (104, 746930), (113, 687440), (130, 597544), (208, 373465), (226, 343720), (260, 298772), (452, 171860), (520, 149386), (565, 137488), (661, 117520), (904, 85930), (1040, 74693), (1130, 68744), (1322, 58760), (1469, 52880), (1808, 42965), (2260, 34372), (2644, 29380), (2938, 26440), (3305, 23504), (4520, 17186), (5288, 14690), (5876, 13220), (6610, 11752), (7345, 10576), (8593, 9040)]