20823775

素因数分解:

$5^2\times 7^2\times {\mathrm{89}}^1\times {\mathrm{191}}^1$

素因数の和:304

約数の個数: 36

約数和(自身を含む): 30533760

約数和(自身を除く): 9709985

約数列:

[1, 5, 7, 25, 35, 49, 89, 175, 191, 245, 445, 623, 955, 1225, 1337, 2225, 3115, 4361, 4775, 6685, 9359, 15575, 16999, 21805, 33425, 46795, 84995, 109025, 118993, 233975, 424975, 594965, 832951, 2974825, 4164755, 20823775]

約数ペア:

[(1, 20823775), (5, 4164755), (7, 2974825), (25, 832951), (35, 594965), (49, 424975), (89, 233975), (175, 118993), (191, 109025), (245, 84995), (445, 46795), (623, 33425), (955, 21805), (1225, 16999), (1337, 15575), (2225, 9359), (3115, 6685), (4361, 4775)]