19962700

素因数分解:

$2^2\times 5^2\times {\mathrm{89}}^1\times {\mathrm{2243}}^1$

素因数の和:2346

約数の個数: 36

約数和(自身を含む): 43825320

約数和(自身を除く): 23862620

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 89, 100, 178, 356, 445, 890, 1780, 2225, 2243, 4450, 4486, 8900, 8972, 11215, 22430, 44860, 56075, 112150, 199627, 224300, 399254, 798508, 998135, 1996270, 3992540, 4990675, 9981350, 19962700]

約数ペア:

[(1, 19962700), (2, 9981350), (4, 4990675), (5, 3992540), (10, 1996270), (20, 998135), (25, 798508), (50, 399254), (89, 224300), (100, 199627), (178, 112150), (356, 56075), (445, 44860), (890, 22430), (1780, 11215), (2225, 8972), (2243, 8900), (4450, 4486)]