17919980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{439}}^1$

素因数の和:618

約数の個数: 48

約数和(自身を含む): 40877760

約数和(自身を除く): 22957780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 157, 260, 314, 439, 628, 785, 878, 1570, 1756, 2041, 2195, 3140, 4082, 4390, 5707, 8164, 8780, 10205, 11414, 20410, 22828, 28535, 40820, 57070, 68923, 114140, 137846, 275692, 344615, 689230, 895999, 1378460, 1791998, 3583996, 4479995, 8959990, 17919980]

約数ペア:

[(1, 17919980), (2, 8959990), (4, 4479995), (5, 3583996), (10, 1791998), (13, 1378460), (20, 895999), (26, 689230), (52, 344615), (65, 275692), (130, 137846), (157, 114140), (260, 68923), (314, 57070), (439, 40820), (628, 28535), (785, 22828), (878, 20410), (1570, 11414), (1756, 10205), (2041, 8780), (2195, 8164), (3140, 5707), (4082, 4390)]