28728520

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{5167}}^1$

素因数の和:5317

約数の個数: 32

約数和(自身を含む): 65116800

約数和(自身を除く): 36388280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 5167, 5560, 10334, 20668, 25835, 41336, 51670, 103340, 206680, 718213, 1436426, 2872852, 3591065, 5745704, 7182130, 14364260, 28728520]

約数ペア:

[(1, 28728520), (2, 14364260), (4, 7182130), (5, 5745704), (8, 3591065), (10, 2872852), (20, 1436426), (40, 718213), (139, 206680), (278, 103340), (556, 51670), (695, 41336), (1112, 25835), (1390, 20668), (2780, 10334), (5167, 5560)]