19737860

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{389}}^1$

素因数の和:500

約数の個数: 48

約数和(自身を含む): 43243200

約数和(自身を除く): 23505340

約数列:

[1, 2, 4, 5, 10, 20, 43, 59, 86, 118, 172, 215, 236, 295, 389, 430, 590, 778, 860, 1180, 1556, 1945, 2537, 3890, 5074, 7780, 10148, 12685, 16727, 22951, 25370, 33454, 45902, 50740, 66908, 83635, 91804, 114755, 167270, 229510, 334540, 459020, 986893, 1973786, 3947572, 4934465, 9868930, 19737860]

約数ペア:

[(1, 19737860), (2, 9868930), (4, 4934465), (5, 3947572), (10, 1973786), (20, 986893), (43, 459020), (59, 334540), (86, 229510), (118, 167270), (172, 114755), (215, 91804), (236, 83635), (295, 66908), (389, 50740), (430, 45902), (590, 33454), (778, 25370), (860, 22951), (1180, 16727), (1556, 12685), (1945, 10148), (2537, 7780), (3890, 5074)]