13250920

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1289}}^1$

素因数の和:1557

約数の個数: 32

約数和(自身を含む): 29953800

約数和(自身を除く): 16702880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 1289, 2056, 2570, 2578, 5140, 5156, 6445, 10280, 10312, 12890, 25780, 51560, 331273, 662546, 1325092, 1656365, 2650184, 3312730, 6625460, 13250920]

約数ペア:

[(1, 13250920), (2, 6625460), (4, 3312730), (5, 2650184), (8, 1656365), (10, 1325092), (20, 662546), (40, 331273), (257, 51560), (514, 25780), (1028, 12890), (1285, 10312), (1289, 10280), (2056, 6445), (2570, 5156), (2578, 5140)]