18147100

素因数分解:

$2^2\times 5^2\times {\mathrm{89}}^1\times {\mathrm{2039}}^1$

素因数の和:2142

約数の個数: 36

約数和(自身を含む): 39841200

約数和(自身を除く): 21694100

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 89, 100, 178, 356, 445, 890, 1780, 2039, 2225, 4078, 4450, 8156, 8900, 10195, 20390, 40780, 50975, 101950, 181471, 203900, 362942, 725884, 907355, 1814710, 3629420, 4536775, 9073550, 18147100]

約数ペア:

[(1, 18147100), (2, 9073550), (4, 4536775), (5, 3629420), (10, 1814710), (20, 907355), (25, 725884), (50, 362942), (89, 203900), (100, 181471), (178, 101950), (356, 50975), (445, 40780), (890, 20390), (1780, 10195), (2039, 8900), (2225, 8156), (4078, 4450)]