21471440

素因数分解:

$2^4\times 5^1\times {\mathrm{311}}^1\times {\mathrm{863}}^1$

素因数の和:1187

約数の個数: 40

約数和(自身を含む): 50139648

約数和(自身を除く): 28668208

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 311, 622, 863, 1244, 1555, 1726, 2488, 3110, 3452, 4315, 4976, 6220, 6904, 8630, 12440, 13808, 17260, 24880, 34520, 69040, 268393, 536786, 1073572, 1341965, 2147144, 2683930, 4294288, 5367860, 10735720, 21471440]

約数ペア:

[(1, 21471440), (2, 10735720), (4, 5367860), (5, 4294288), (8, 2683930), (10, 2147144), (16, 1341965), (20, 1073572), (40, 536786), (80, 268393), (311, 69040), (622, 34520), (863, 24880), (1244, 17260), (1555, 13808), (1726, 12440), (2488, 8630), (3110, 6904), (3452, 6220), (4315, 4976)]