20601560

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{457}}^1$

素因数の和:505

約数の個数: 96

約数和(自身を含む): 56388960

約数和(自身を除く): 35787400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 49, 56, 70, 92, 98, 115, 140, 161, 184, 196, 230, 245, 280, 322, 392, 457, 460, 490, 644, 805, 914, 920, 980, 1127, 1288, 1610, 1828, 1960, 2254, 2285, 3199, 3220, 3656, 4508, 4570, 5635, 6398, 6440, 9016, 9140, 10511, 11270, 12796, 15995, 18280, 21022, 22393, 22540, 25592, 31990, 42044, 44786, 45080, 52555, 63980, 73577, 84088, 89572, 105110, 111965, 127960, 147154, 179144, 210220, 223930, 294308, 367885, 420440, 447860, 515039, 588616, 735770, 895720, 1030078, 1471540, 2060156, 2575195, 2943080, 4120312, 5150390, 10300780, 20601560]

約数ペア:

[(1, 20601560), (2, 10300780), (4, 5150390), (5, 4120312), (7, 2943080), (8, 2575195), (10, 2060156), (14, 1471540), (20, 1030078), (23, 895720), (28, 735770), (35, 588616), (40, 515039), (46, 447860), (49, 420440), (56, 367885), (70, 294308), (92, 223930), (98, 210220), (115, 179144), (140, 147154), (161, 127960), (184, 111965), (196, 105110), (230, 89572), (245, 84088), (280, 73577), (322, 63980), (392, 52555), (457, 45080), (460, 44786), (490, 42044), (644, 31990), (805, 25592), (914, 22540), (920, 22393), (980, 21022), (1127, 18280), (1288, 15995), (1610, 12796), (1828, 11270), (1960, 10511), (2254, 9140), (2285, 9016), (3199, 6440), (3220, 6398), (3656, 5635), (4508, 4570)]