181020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{431}}^1$

素因数の和:450

約数の個数: 48

約数和(自身を含む): 580608

約数和(自身を除く): 399588

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 431, 862, 1293, 1724, 2155, 2586, 3017, 4310, 5172, 6034, 6465, 8620, 9051, 12068, 12930, 15085, 18102, 25860, 30170, 36204, 45255, 60340, 90510, 181020]

約数ペア:

[(1, 181020), (2, 90510), (3, 60340), (4, 45255), (5, 36204), (6, 30170), (7, 25860), (10, 18102), (12, 15085), (14, 12930), (15, 12068), (20, 9051), (21, 8620), (28, 6465), (30, 6034), (35, 5172), (42, 4310), (60, 3017), (70, 2586), (84, 2155), (105, 1724), (140, 1293), (210, 862), (420, 431)]