20029520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{761}}^1$

素因数の和:828

約数の個数: 80

約数和(自身を含む): 54425088

約数和(自身を除く): 34395568

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 47, 56, 70, 80, 94, 112, 140, 188, 235, 280, 329, 376, 470, 560, 658, 752, 761, 940, 1316, 1522, 1645, 1880, 2632, 3044, 3290, 3760, 3805, 5264, 5327, 6088, 6580, 7610, 10654, 12176, 13160, 15220, 21308, 26320, 26635, 30440, 35767, 42616, 53270, 60880, 71534, 85232, 106540, 143068, 178835, 213080, 250369, 286136, 357670, 426160, 500738, 572272, 715340, 1001476, 1251845, 1430680, 2002952, 2503690, 2861360, 4005904, 5007380, 10014760, 20029520]

約数ペア:

[(1, 20029520), (2, 10014760), (4, 5007380), (5, 4005904), (7, 2861360), (8, 2503690), (10, 2002952), (14, 1430680), (16, 1251845), (20, 1001476), (28, 715340), (35, 572272), (40, 500738), (47, 426160), (56, 357670), (70, 286136), (80, 250369), (94, 213080), (112, 178835), (140, 143068), (188, 106540), (235, 85232), (280, 71534), (329, 60880), (376, 53270), (470, 42616), (560, 35767), (658, 30440), (752, 26635), (761, 26320), (940, 21308), (1316, 15220), (1522, 13160), (1645, 12176), (1880, 10654), (2632, 7610), (3044, 6580), (3290, 6088), (3760, 5327), (3805, 5264)]