20902816

素因数分解:

$2^5\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1381}}^1$

素因数の和:1445

約数の個数: 48

約数和(自身を含む): 45970848

約数和(自身を除く): 25068032

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 43, 44, 86, 88, 172, 176, 344, 352, 473, 688, 946, 1376, 1381, 1892, 2762, 3784, 5524, 7568, 11048, 15136, 15191, 22096, 30382, 44192, 59383, 60764, 118766, 121528, 237532, 243056, 475064, 486112, 653213, 950128, 1306426, 1900256, 2612852, 5225704, 10451408, 20902816]

約数ペア:

[(1, 20902816), (2, 10451408), (4, 5225704), (8, 2612852), (11, 1900256), (16, 1306426), (22, 950128), (32, 653213), (43, 486112), (44, 475064), (86, 243056), (88, 237532), (172, 121528), (176, 118766), (344, 60764), (352, 59383), (473, 44192), (688, 30382), (946, 22096), (1376, 15191), (1381, 15136), (1892, 11048), (2762, 7568), (3784, 5524)]