81691480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{1237}}^1$

素因数の和:1388

約数の個数: 64

約数和(自身を含む): 199664640

約数和(自身を除く): 117973160

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 127, 130, 254, 260, 508, 520, 635, 1016, 1237, 1270, 1651, 2474, 2540, 3302, 4948, 5080, 6185, 6604, 8255, 9896, 12370, 13208, 16081, 16510, 24740, 32162, 33020, 49480, 64324, 66040, 80405, 128648, 157099, 160810, 314198, 321620, 628396, 643240, 785495, 1256792, 1570990, 2042287, 3141980, 4084574, 6283960, 8169148, 10211435, 16338296, 20422870, 40845740, 81691480]

約数ペア:

[(1, 81691480), (2, 40845740), (4, 20422870), (5, 16338296), (8, 10211435), (10, 8169148), (13, 6283960), (20, 4084574), (26, 3141980), (40, 2042287), (52, 1570990), (65, 1256792), (104, 785495), (127, 643240), (130, 628396), (254, 321620), (260, 314198), (508, 160810), (520, 157099), (635, 128648), (1016, 80405), (1237, 66040), (1270, 64324), (1651, 49480), (2474, 33020), (2540, 32162), (3302, 24740), (4948, 16510), (5080, 16081), (6185, 13208), (6604, 12370), (8255, 9896)]