18959560

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{151}}^1$

素因数の和:278

約数の個数: 64

約数和(自身を含む): 44542080

約数和(自身を除く): 25582520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 73, 86, 146, 151, 172, 215, 292, 302, 344, 365, 430, 584, 604, 730, 755, 860, 1208, 1460, 1510, 1720, 2920, 3020, 3139, 6040, 6278, 6493, 11023, 12556, 12986, 15695, 22046, 25112, 25972, 31390, 32465, 44092, 51944, 55115, 62780, 64930, 88184, 110230, 125560, 129860, 220460, 259720, 440920, 473989, 947978, 1895956, 2369945, 3791912, 4739890, 9479780, 18959560]

約数ペア:

[(1, 18959560), (2, 9479780), (4, 4739890), (5, 3791912), (8, 2369945), (10, 1895956), (20, 947978), (40, 473989), (43, 440920), (73, 259720), (86, 220460), (146, 129860), (151, 125560), (172, 110230), (215, 88184), (292, 64930), (302, 62780), (344, 55115), (365, 51944), (430, 44092), (584, 32465), (604, 31390), (730, 25972), (755, 25112), (860, 22046), (1208, 15695), (1460, 12986), (1510, 12556), (1720, 11023), (2920, 6493), (3020, 6278), (3139, 6040)]