81838040

素因数分解:

$2^3\times 5^1\times {\mathrm{227}}^1\times {\mathrm{9013}}^1$

素因数の和:9251

約数の個数: 32

約数和(自身を含む): 184967280

約数和(自身を除く): 103129240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 227, 454, 908, 1135, 1816, 2270, 4540, 9013, 9080, 18026, 36052, 45065, 72104, 90130, 180260, 360520, 2045951, 4091902, 8183804, 10229755, 16367608, 20459510, 40919020, 81838040]

約数ペア:

[(1, 81838040), (2, 40919020), (4, 20459510), (5, 16367608), (8, 10229755), (10, 8183804), (20, 4091902), (40, 2045951), (227, 360520), (454, 180260), (908, 90130), (1135, 72104), (1816, 45065), (2270, 36052), (4540, 18026), (9013, 9080)]