20168757

素因数分解:

$3^5\times 7^1\times {\mathrm{71}}^1\times {\mathrm{167}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 35223552

約数和(自身を除く): 15054795

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 81, 167, 189, 213, 243, 497, 501, 567, 639, 1169, 1491, 1503, 1701, 1917, 3507, 4473, 4509, 5751, 10521, 11857, 13419, 13527, 17253, 31563, 35571, 40257, 40581, 82999, 94689, 106713, 120771, 248997, 284067, 320139, 746991, 960417, 2240973, 2881251, 6722919, 20168757]

約数ペア:

[(1, 20168757), (3, 6722919), (7, 2881251), (9, 2240973), (21, 960417), (27, 746991), (63, 320139), (71, 284067), (81, 248997), (167, 120771), (189, 106713), (213, 94689), (243, 82999), (497, 40581), (501, 40257), (567, 35571), (639, 31563), (1169, 17253), (1491, 13527), (1503, 13419), (1701, 11857), (1917, 10521), (3507, 5751), (4473, 4509)]