12640940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{48619}}^1$

素因数の和:48641

約数の個数: 24

約数和(自身を含む): 28588560

約数和(自身を除く): 15947620

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 48619, 97238, 194476, 243095, 486190, 632047, 972380, 1264094, 2528188, 3160235, 6320470, 12640940]

約数ペア:

[(1, 12640940), (2, 6320470), (4, 3160235), (5, 2528188), (10, 1264094), (13, 972380), (20, 632047), (26, 486190), (52, 243095), (65, 194476), (130, 97238), (260, 48619)]