18161120

素因数分解:

$2^5\times 5^1\times {\mathrm{223}}^1\times {\mathrm{509}}^1$

素因数の和:747

約数の個数: 48

約数和(自身を含む): 43182720

約数和(自身を除く): 25021600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 223, 446, 509, 892, 1018, 1115, 1784, 2036, 2230, 2545, 3568, 4072, 4460, 5090, 7136, 8144, 8920, 10180, 16288, 17840, 20360, 35680, 40720, 81440, 113507, 227014, 454028, 567535, 908056, 1135070, 1816112, 2270140, 3632224, 4540280, 9080560, 18161120]

約数ペア:

[(1, 18161120), (2, 9080560), (4, 4540280), (5, 3632224), (8, 2270140), (10, 1816112), (16, 1135070), (20, 908056), (32, 567535), (40, 454028), (80, 227014), (160, 113507), (223, 81440), (446, 40720), (509, 35680), (892, 20360), (1018, 17840), (1115, 16288), (1784, 10180), (2036, 8920), (2230, 8144), (2545, 7136), (3568, 5090), (4072, 4460)]