20640540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{463}}^1\times {\mathrm{743}}^1$

素因数の和:1218

約数の個数: 48

約数和(自身を含む): 57996288

約数和(自身を除く): 37355748

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 463, 743, 926, 1389, 1486, 1852, 2229, 2315, 2778, 2972, 3715, 4458, 4630, 5556, 6945, 7430, 8916, 9260, 11145, 13890, 14860, 22290, 27780, 44580, 344009, 688018, 1032027, 1376036, 1720045, 2064054, 3440090, 4128108, 5160135, 6880180, 10320270, 20640540]

約数ペア:

[(1, 20640540), (2, 10320270), (3, 6880180), (4, 5160135), (5, 4128108), (6, 3440090), (10, 2064054), (12, 1720045), (15, 1376036), (20, 1032027), (30, 688018), (60, 344009), (463, 44580), (743, 27780), (926, 22290), (1389, 14860), (1486, 13890), (1852, 11145), (2229, 9260), (2315, 8916), (2778, 7430), (2972, 6945), (3715, 5556), (4458, 4630)]