21322160

素因数分解:

$2^4\times 5^1\times {\mathrm{311}}^1\times {\mathrm{857}}^1$

素因数の和:1181

約数の個数: 40

約数和(自身を含む): 49791456

約数和(自身を除く): 28469296

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 311, 622, 857, 1244, 1555, 1714, 2488, 3110, 3428, 4285, 4976, 6220, 6856, 8570, 12440, 13712, 17140, 24880, 34280, 68560, 266527, 533054, 1066108, 1332635, 2132216, 2665270, 4264432, 5330540, 10661080, 21322160]

約数ペア:

[(1, 21322160), (2, 10661080), (4, 5330540), (5, 4264432), (8, 2665270), (10, 2132216), (16, 1332635), (20, 1066108), (40, 533054), (80, 266527), (311, 68560), (622, 34280), (857, 24880), (1244, 17140), (1555, 13712), (1714, 12440), (2488, 8570), (3110, 6856), (3428, 6220), (4285, 4976)]