8011780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{643}}^1$

素因数の和:748

約数の個数: 48

約数和(自身を含む): 19474560

約数和(自身を除く): 11462780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 89, 140, 178, 356, 445, 623, 643, 890, 1246, 1286, 1780, 2492, 2572, 3115, 3215, 4501, 6230, 6430, 9002, 12460, 12860, 18004, 22505, 45010, 57227, 90020, 114454, 228908, 286135, 400589, 572270, 801178, 1144540, 1602356, 2002945, 4005890, 8011780]

約数ペア:

[(1, 8011780), (2, 4005890), (4, 2002945), (5, 1602356), (7, 1144540), (10, 801178), (14, 572270), (20, 400589), (28, 286135), (35, 228908), (70, 114454), (89, 90020), (140, 57227), (178, 45010), (356, 22505), (445, 18004), (623, 12860), (643, 12460), (890, 9002), (1246, 6430), (1286, 6230), (1780, 4501), (2492, 3215), (2572, 3115)]