21043720

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{3041}}^1$

素因数の和:3225

約数の個数: 32

約数和(自身を含む): 47637720

約数和(自身を除く): 26594000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 3041, 3460, 6082, 6920, 12164, 15205, 24328, 30410, 60820, 121640, 526093, 1052186, 2104372, 2630465, 4208744, 5260930, 10521860, 21043720]

約数ペア:

[(1, 21043720), (2, 10521860), (4, 5260930), (5, 4208744), (8, 2630465), (10, 2104372), (20, 1052186), (40, 526093), (173, 121640), (346, 60820), (692, 30410), (865, 24328), (1384, 15205), (1730, 12164), (3041, 6920), (3460, 6082)]