25499860

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1\times {\mathrm{199}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 55440000

約数和(自身を除く): 29940140

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 149, 172, 199, 215, 298, 398, 430, 596, 745, 796, 860, 995, 1490, 1990, 2980, 3980, 6407, 8557, 12814, 17114, 25628, 29651, 32035, 34228, 42785, 59302, 64070, 85570, 118604, 128140, 148255, 171140, 296510, 593020, 1274993, 2549986, 5099972, 6374965, 12749930, 25499860]

約数ペア:

[(1, 25499860), (2, 12749930), (4, 6374965), (5, 5099972), (10, 2549986), (20, 1274993), (43, 593020), (86, 296510), (149, 171140), (172, 148255), (199, 128140), (215, 118604), (298, 85570), (398, 64070), (430, 59302), (596, 42785), (745, 34228), (796, 32035), (860, 29651), (995, 25628), (1490, 17114), (1990, 12814), (2980, 8557), (3980, 6407)]