20325025

素因数分解:

$5^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:170

約数の個数: 48

約数和(自身を含む): 30684544

約数和(自身を除く): 10359519

約数列:

[1, 5, 7, 25, 35, 37, 43, 73, 175, 185, 215, 259, 301, 365, 511, 925, 1075, 1295, 1505, 1591, 1825, 2555, 2701, 3139, 6475, 7525, 7955, 11137, 12775, 13505, 15695, 18907, 21973, 39775, 55685, 67525, 78475, 94535, 109865, 116143, 278425, 472675, 549325, 580715, 813001, 2903575, 4065005, 20325025]

約数ペア:

[(1, 20325025), (5, 4065005), (7, 2903575), (25, 813001), (35, 580715), (37, 549325), (43, 472675), (73, 278425), (175, 116143), (185, 109865), (215, 94535), (259, 78475), (301, 67525), (365, 55685), (511, 39775), (925, 21973), (1075, 18907), (1295, 15695), (1505, 13505), (1591, 12775), (1825, 11137), (2555, 7955), (2701, 7525), (3139, 6475)]