20828920

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10627}}^1$

素因数の和:10652

約数の個数: 48

約数和(自身を含む): 54521640

約数和(自身を除く): 33692720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10627, 21254, 42508, 53135, 74389, 85016, 106270, 148778, 212540, 297556, 371945, 425080, 520723, 595112, 743890, 1041446, 1487780, 2082892, 2603615, 2975560, 4165784, 5207230, 10414460, 20828920]

約数ペア:

[(1, 20828920), (2, 10414460), (4, 5207230), (5, 4165784), (7, 2975560), (8, 2603615), (10, 2082892), (14, 1487780), (20, 1041446), (28, 743890), (35, 595112), (40, 520723), (49, 425080), (56, 371945), (70, 297556), (98, 212540), (140, 148778), (196, 106270), (245, 85016), (280, 74389), (392, 53135), (490, 42508), (980, 21254), (1960, 10627)]