142725740

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{181}}^1\times {\mathrm{443}}^1$

素因数の和:722

約数の個数: 48

約数和(自身を含む): 305454240

約数和(自身を除く): 162728500

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 181, 356, 362, 443, 445, 724, 886, 890, 905, 1772, 1780, 1810, 2215, 3620, 4430, 8860, 16109, 32218, 39427, 64436, 78854, 80183, 80545, 157708, 160366, 161090, 197135, 320732, 322180, 394270, 400915, 788540, 801830, 1603660, 7136287, 14272574, 28545148, 35681435, 71362870, 142725740]

約数ペア:

[(1, 142725740), (2, 71362870), (4, 35681435), (5, 28545148), (10, 14272574), (20, 7136287), (89, 1603660), (178, 801830), (181, 788540), (356, 400915), (362, 394270), (443, 322180), (445, 320732), (724, 197135), (886, 161090), (890, 160366), (905, 157708), (1772, 80545), (1780, 80183), (1810, 78854), (2215, 64436), (3620, 39427), (4430, 32218), (8860, 16109)]