20165000

素因数分解:

$2^3\times 5^4\times {\mathrm{37}}^1\times {\mathrm{109}}^1$

素因数の和:172

約数の個数: 80

約数和(自身を含む): 48968700

約数和(自身を除く): 28803700

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 37, 40, 50, 74, 100, 109, 125, 148, 185, 200, 218, 250, 296, 370, 436, 500, 545, 625, 740, 872, 925, 1000, 1090, 1250, 1480, 1850, 2180, 2500, 2725, 3700, 4033, 4360, 4625, 5000, 5450, 7400, 8066, 9250, 10900, 13625, 16132, 18500, 20165, 21800, 23125, 27250, 32264, 37000, 40330, 46250, 54500, 68125, 80660, 92500, 100825, 109000, 136250, 161320, 185000, 201650, 272500, 403300, 504125, 545000, 806600, 1008250, 2016500, 2520625, 4033000, 5041250, 10082500, 20165000]

約数ペア:

[(1, 20165000), (2, 10082500), (4, 5041250), (5, 4033000), (8, 2520625), (10, 2016500), (20, 1008250), (25, 806600), (37, 545000), (40, 504125), (50, 403300), (74, 272500), (100, 201650), (109, 185000), (125, 161320), (148, 136250), (185, 109000), (200, 100825), (218, 92500), (250, 80660), (296, 68125), (370, 54500), (436, 46250), (500, 40330), (545, 37000), (625, 32264), (740, 27250), (872, 23125), (925, 21800), (1000, 20165), (1090, 18500), (1250, 16132), (1480, 13625), (1850, 10900), (2180, 9250), (2500, 8066), (2725, 7400), (3700, 5450), (4033, 5000), (4360, 4625)]