18889840

素因数分解:

$2^4\times 5^1\times {\mathrm{389}}^1\times {\mathrm{607}}^1$

素因数の和:1009

約数の個数: 40

約数和(自身を含む): 44104320

約数和(自身を除く): 25214480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 389, 607, 778, 1214, 1556, 1945, 2428, 3035, 3112, 3890, 4856, 6070, 6224, 7780, 9712, 12140, 15560, 24280, 31120, 48560, 236123, 472246, 944492, 1180615, 1888984, 2361230, 3777968, 4722460, 9444920, 18889840]

約数ペア:

[(1, 18889840), (2, 9444920), (4, 4722460), (5, 3777968), (8, 2361230), (10, 1888984), (16, 1180615), (20, 944492), (40, 472246), (80, 236123), (389, 48560), (607, 31120), (778, 24280), (1214, 15560), (1556, 12140), (1945, 9712), (2428, 7780), (3035, 6224), (3112, 6070), (3890, 4856)]