28789720

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{8087}}^1$

素因数の和:8187

約数の個数: 32

約数和(自身を含む): 65512800

約数和(自身を除く): 36723080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 8087, 16174, 32348, 40435, 64696, 80870, 161740, 323480, 719743, 1439486, 2878972, 3598715, 5757944, 7197430, 14394860, 28789720]

約数ペア:

[(1, 28789720), (2, 14394860), (4, 7197430), (5, 5757944), (8, 3598715), (10, 2878972), (20, 1439486), (40, 719743), (89, 323480), (178, 161740), (356, 80870), (445, 64696), (712, 40435), (890, 32348), (1780, 16174), (3560, 8087)]