12723440

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1787}}^1$

素因数の和:1889

約数の個数: 40

約数和(自身を含む): 29931120

約数和(自身を除く): 17207680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 1787, 3560, 3574, 7120, 7148, 8935, 14296, 17870, 28592, 35740, 71480, 142960, 159043, 318086, 636172, 795215, 1272344, 1590430, 2544688, 3180860, 6361720, 12723440]

約数ペア:

[(1, 12723440), (2, 6361720), (4, 3180860), (5, 2544688), (8, 1590430), (10, 1272344), (16, 795215), (20, 636172), (40, 318086), (80, 159043), (89, 142960), (178, 71480), (356, 35740), (445, 28592), (712, 17870), (890, 14296), (1424, 8935), (1780, 7148), (1787, 7120), (3560, 3574)]