18709840

素因数分解:

$2^4\times 5^1\times {\mathrm{271}}^1\times {\mathrm{863}}^1$

素因数の和:1147

約数の個数: 40

約数和(自身を含む): 43711488

約数和(自身を除く): 25001648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271, 542, 863, 1084, 1355, 1726, 2168, 2710, 3452, 4315, 4336, 5420, 6904, 8630, 10840, 13808, 17260, 21680, 34520, 69040, 233873, 467746, 935492, 1169365, 1870984, 2338730, 3741968, 4677460, 9354920, 18709840]

約数ペア:

[(1, 18709840), (2, 9354920), (4, 4677460), (5, 3741968), (8, 2338730), (10, 1870984), (16, 1169365), (20, 935492), (40, 467746), (80, 233873), (271, 69040), (542, 34520), (863, 21680), (1084, 17260), (1355, 13808), (1726, 10840), (2168, 8630), (2710, 6904), (3452, 5420), (4315, 4336)]