1286480

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1237}}^1$

素因数の和:1263

約数の個数: 40

約数和(自身を含む): 3223752

約数和(自身を除く): 1937272

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 1237, 2474, 4948, 6185, 9896, 12370, 16081, 19792, 24740, 32162, 49480, 64324, 80405, 98960, 128648, 160810, 257296, 321620, 643240, 1286480]

約数ペア:

[(1, 1286480), (2, 643240), (4, 321620), (5, 257296), (8, 160810), (10, 128648), (13, 98960), (16, 80405), (20, 64324), (26, 49480), (40, 32162), (52, 24740), (65, 19792), (80, 16081), (104, 12370), (130, 9896), (208, 6185), (260, 4948), (520, 2474), (1040, 1237)]