28490420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1867}}^1$

素因数の和:1992

約数の個数: 48

約数和(自身を含む): 69041280

約数和(自身を除く): 40550860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 218, 436, 545, 763, 1090, 1526, 1867, 2180, 3052, 3734, 3815, 7468, 7630, 9335, 13069, 15260, 18670, 26138, 37340, 52276, 65345, 130690, 203503, 261380, 407006, 814012, 1017515, 1424521, 2035030, 2849042, 4070060, 5698084, 7122605, 14245210, 28490420]

約数ペア:

[(1, 28490420), (2, 14245210), (4, 7122605), (5, 5698084), (7, 4070060), (10, 2849042), (14, 2035030), (20, 1424521), (28, 1017515), (35, 814012), (70, 407006), (109, 261380), (140, 203503), (218, 130690), (436, 65345), (545, 52276), (763, 37340), (1090, 26138), (1526, 18670), (1867, 15260), (2180, 13069), (3052, 9335), (3734, 7630), (3815, 7468)]