19679920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{149}}^1$

素因数の和:302

約数の個数: 80

約数和(自身を含む): 49996800

約数和(自身を除く): 30316880

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 127, 130, 149, 208, 254, 260, 298, 508, 520, 596, 635, 745, 1016, 1040, 1192, 1270, 1490, 1651, 1937, 2032, 2384, 2540, 2980, 3302, 3874, 5080, 5960, 6604, 7748, 8255, 9685, 10160, 11920, 13208, 15496, 16510, 18923, 19370, 26416, 30992, 33020, 37846, 38740, 66040, 75692, 77480, 94615, 132080, 151384, 154960, 189230, 245999, 302768, 378460, 491998, 756920, 983996, 1229995, 1513840, 1967992, 2459990, 3935984, 4919980, 9839960, 19679920]

約数ペア:

[(1, 19679920), (2, 9839960), (4, 4919980), (5, 3935984), (8, 2459990), (10, 1967992), (13, 1513840), (16, 1229995), (20, 983996), (26, 756920), (40, 491998), (52, 378460), (65, 302768), (80, 245999), (104, 189230), (127, 154960), (130, 151384), (149, 132080), (208, 94615), (254, 77480), (260, 75692), (298, 66040), (508, 38740), (520, 37846), (596, 33020), (635, 30992), (745, 26416), (1016, 19370), (1040, 18923), (1192, 16510), (1270, 15496), (1490, 13208), (1651, 11920), (1937, 10160), (2032, 9685), (2384, 8255), (2540, 7748), (2980, 6604), (3302, 5960), (3874, 5080)]